While testing last week I conclusively found that when you zone into the Entrance Hall from the Wine Cellar, there is an event that removes your ability to run. After zoning into the laboratory, this status will stay and you will not be able to run until you trigger and end the next flashback. But if you hesitate before zoning in, the event will end and you will be able to run in the lab, saving 3 or 4 seconds overall.
A heads up on this strategy. The setup varies depending upon your computer and graphics settings
First off, I normally run the game at very low resolution to reduce graphical lag. The sweet-spot to aim the mouse pointer is so specific that I had to increase my resolution from the minimum to the maximum just to clearly see my aim and consistently get my crosshair on that point.
Secondly, that point varies. I have two different computers I practice on. On the first one, I can only get this strat to work by aiming slightly below the intersection of the bricks (and the sweet spot is pretty forgiving). On the second one, it only works if I aim several pixels high (and the sweet spot is much more precise). The strat will not work on either computer with the aiming shown in your video but it works consistently as I have described. So if anyone can't get this to work, try moving the point up and down a bit. I think it has to do with the specific screen resolution but more testing is needed.
Also, there is an occasional event that triggers in the zone where there is a rumbling and everything trembles for a few seconds. This strat will not work while that is happening.
---EDIT---
I think I have figured out what it is. My system that aimed high; I changed my screen resolution and now I have to aim low on it. The new resolution has a different aspect ratio. My current hypothesis is that the aspect ratio subtly affects the angle that you look down at. It's just a few pixels, but that's all it takes.
Quote from Teravortryx:
I found a better way to do the Choir gap jump, which is based off of Arazath's setup. My success rate with this new method is over 95%, which I'm really satisfied with.
A heads up on this strategy. The setup varies depending upon your computer and graphics settings
First off, I normally run the game at very low resolution to reduce graphical lag. The sweet-spot to aim the mouse pointer is so specific that I had to increase my resolution from the minimum to the maximum just to clearly see my aim and consistently get my crosshair on that point.
Secondly, that point varies. I have two different computers I practice on. On the first one, I can only get this strat to work by aiming slightly below the intersection of the bricks (and the sweet spot is pretty forgiving). On the second one, it only works if I aim several pixels high (and the sweet spot is much more precise). The strat will not work on either computer with the aiming shown in your video but it works consistently as I have described. So if anyone can't get this to work, try moving the point up and down a bit. I think it has to do with the specific screen resolution but more testing is needed.
Also, there is an occasional event that triggers in the zone where there is a rumbling and everything trembles for a few seconds. This strat will not work while that is happening.
---EDIT---
I think I have figured out what it is. My system that aimed high; I changed my screen resolution and now I have to aim low on it. The new resolution has a different aspect ratio. My current hypothesis is that the aspect ratio subtly affects the angle that you look down at. It's just a few pixels, but that's all it takes.