SOURCE

I was wrong about it being called 'Physical Impulse', according to IWS it only effects dead people.

He goes on to say: SOURCE

Is being rooted just the one of the Sprint Bugs / Terrain Glitches acting up? If it is it has been getting a lot worse. Not sure what to make of it, I am quite sure that I have been rooted while I was sprintingGǪ

Origin:
The specific origin of what we call "Stun Lock" is unclear; an increased frequency has been observed since December of 2013; hence primary suspect, 1.7 Patch Note: "Physical Impact", be it related or not.

Frequency:
The affect is regularly observed, though not consistently. Odds of replication can be heavily influenced.

Replication:
The HMG induces this affect at greatest frequency, the burst-fire Combat Rifle at second greatest frequency. Biotic Scouts are at highest risk of impact. Wearing Armor Plates decreases odds of replication. Stacking KinCats increases odds of replication.

The HMG is definitely the worst offender, even when I had a tanked cal assault it felt like I hit molasses when they shot me. Please fix!

Point of clarification.

I was under the impression that "stun lock" was different from the "sprint bug".

The "stun lock" being described well in your OP.

The "sprint bug" often being referred to a circumstance in which switching or using weapons (I can't remember the specifics) while sprinting creates a slow down of the merc in question after the sprint, which is often fixed by crouching, and reportedly meleeing, the latter of which I have found ineffective. As far as I can see this itself does not have anything to do with being fired upon.

Of course I could be misreading things, as I do frequently.

RE: Stun lock. It has to go!!!

No lab environments yet?

Well the few clues posted so far will be useful.

@ IWS
Tell us what you'd like to see, and we'll perform the experiment. The bug is easy enough to replicate, but it is more felt than seen, so I'm not sure how clearly it'd present via screen capture. I was kinda hoping QA would "feel" it for themselves, but we're glad to help in any way we can.

@ Brothers
Any ideas on how we might "prove" or demonstrate this one?

Well we have our clues; it seems speed based and certain weapons have a high proc. the problem is the test subjects are... paper thin.

Things I would like to know is there a point in the damage input the slowdown occurs?
Video evidence would go eons in figuring it out.
Testing with to figure out which has the highest proc rate then finding weapons that have any sort of proc rate.

Test parameters:

Make a point a to b probably two road cones.

Get a scout fit that is decent health and speed you think can help trigger the effect? this is likely going to be the caldari suit based on the clues given so far.

Have him start the run before the first cone and don't have him stop after he passes the second cone. Time only the start and end of the cone.

Once you get the unadulterated average speed. Then include weapons fire at the middle point. prefire a bit and fire enough to break shields and then cease fire. Observe the times if they're any different.

Its not hard to replicate, it happens every time you get shot.

Usually I die too fast while it happens, with only having about 220 ehp.

The time I noticed it the longest was while a heavy was hitting me with an HMG at a distance, and I was trying to round a corner to get away. I lasted longer because not all his shots hit me, but every step or two one would, and it was like I hit a wall.

Maybe it would be easiest to replicate with a low dps weapon, a heavy or sentinal, and some kincats for speed? That way the tester would live long enough to show the reduced speed, and the original speed would be high enough to notice a reduction.

Just my .02 isk.

If you want to do it with a quickish suit with a large HP pool maybe try a dual kincat minmando? Or hybrid tank a gal scout with armor and kincats. This would give you enough HP and decent speed to really see a difference in run times if tested like IWS suggested.

Well we have our clues; it seems speed based and certain weapons have a high proc. the problem is the test subjects are... paper thin.

Things I would like to know is there a point in the damage input the slowdown occurs?
Video evidence would go eons in figuring it out.
Testing with to figure out which has the highest proc rate then finding weapons that have any sort of proc rate.

Test parameters:

Make a point a to b probably two road cones.

Get a scout fit that is decent health and speed you think can help trigger the effect? this is likely going to be the caldari suit based on the clues given so far.

Have him start the run before the first cone and don't have him stop after he passes the second cone. Time only the start and end of the cone.

Once you get the unadulterated average speed. Then include weapons fire at the middle point. prefire a bit and fire enough to break shields and then cease fire. Observe the times if they're any different.

[HMG Heavies] you have to run when they see you and get too close, but you can't run, no, you slow down to crawl speed as you try to escape

Running away from the HMG is like in those horror films when you see a girl slowly crawling away and suddenly being pulled back to her death.

As an HMG user I can agree that the quicksand is very bad news for medium suits, probably to the point of being over done.

All you have to do is use the search function
https://forums.dust514.com/default.aspx?g=search&search=Patch+Notes&forumID=728&devbadge=1

Tonight we test? Usual time? between 1 and 3? Feeding of **** will have to wait until we are finished.

Not very promising. I think stun lock is more than getting hit with a weapon. I can see and have recorded evidence of "physical impact" but I think the slowdown is not as bad. Or very difficult to replicate. Secondly. I think stun lock is more frequent around objects. I wonder if for some reason it magnetizes you. I feel that's usually my case.

More testing required

Not very promising. More testing required

---

First Experiment

---

I ran two setups ...
GK.0, Cmp KinCats (4), Cmp Shields (2)
CK.0, Cmp KinCats (2), Cmp Shields (4)

Iggy ran a Basic HMG. Dubstep ran a Boundless HMG.
Iggy and Dubstep positioned themselves roughly 30 meters apart, facing one another.

I sprinted through the point between them, crossing their bullet streams.
Never once was I ensnared. D*mnit.

Rather than running perpendicular through the bullet stream, I ran fly-by and slant patterns.
Still, not once was I ensnared.

Tested vs Shield. Test vs Armor. Switched suits to the slower Caldari.
No dice. No Stun Lock.

Lastly, I ran straight at them and leaped, as if to land a charged NK attack.
They would fire, I would die, but I was not Stun Locked mid air.

---

Second Experiment

---

Magnus joined the experiment as our second "Runner", wearing a fit with 3 Complex Kincats. I ran the same fits as before. Iggy swapped HMG for Laser Rifle and Combat Rifle. Dubstep downgraded his Boundless to Basic HMG.

Most Scouts have experienced the "Running in Glue" effect coined Stun Lock; this is the effect we were trying to reproduce. No matter what we tried, we couldn't get Stun Lock to kick in, though we did discover that the CR induced a slight Slow Down. The Burst Combat Rifle consistently made sprint choppy -- as if the system hesitated while registering the bullet strikes -- but at no point did our HMG, Laser or Combat Rifles reproduce the "Running in Glue" effect.

---

Conclusions

---

Hypothesis:
Stun Lock is "built in" to the HMG. REJECTED

Observations:
* Stun Lock cannot be reproduced on demand.
* Burst CR adds choppiness to a target's stride but doesn't ensnare the target (=/= Stun Lock).
* The HMG and Laser Rifle can do the same, though less reliably (=/= Stun Lock).

Alternative Hypothesis:
* Stun Lock is likely not an intentional mechanic, otherwise it would be easy to reproduce.
* Stun Lock may be related to lag / latency or require lots of activity in a given area.
* Stun Lock may be more likely to occur in enclosed spaces than out in the open.

Did you guys test it on a minja suit?

7PM CST is around the busiest time.... hmm. Oh well. Just another problem CCP won't be able to figure out.

Well we have our clues; it seems speed based and certain weapons have a high proc. the problem is the test subjects are... paper thin.

Things I would like to know is there a point in the damage input the slowdown occurs?
Video evidence would go eons in figuring it out.
Testing with to figure out which has the highest proc rate then finding weapons that have any sort of proc rate.

Test parameters:

Make a point a to b probably two road cones.

Get a scout fit that is decent health and speed you think can help trigger the effect? this is likely going to be the caldari suit based on the clues given so far.

Have him start the run before the first cone and don't have him stop after he passes the second cone. Time only the start and end of the cone.

Once you get the unadulterated average speed. Then include weapons fire at the middle point. prefire a bit and fire enough to break shields and then cease fire. Observe the times if they're any different.

Been talking to the developers its being looked into on how to adjust the situation.

Couple things though;

It's not a bug. Yell at me for the confusion and don't go kill a dev. I'll see if I can get permission to post the reason why it is not a bug. Some of you smart folks will figure it out anyways.

Secondly I don't see it being in the game in the long run it will get removed eventually.

Been talking to the developers its being looked into on how to adjust the situation.

Couple things though;

It's not a bug. Yell at me for the confusion and don't go kill a dev. I'll see if I can get permission to post the reason why it is not a bug. Some of you smart folks will figure it out anyways.

Secondly I don't see it being in the game in the long run it will get removed eventually.

I'm not smart Lay it on me

Been talking to the developers its being looked into on how to adjust the situation.

Couple things though;

It's not a bug. Yell at me for the confusion and don't go kill a dev. I'll see if I can get permission to post the reason why it is not a bug. Some of you smart folks will figure it out anyways.

Secondly I don't see it being in the game in the long run it will get removed eventually.