First off shout out to Orophene who found this glitch at the motel, I took this a step further and tested it on like most other transitions throughout the game before finding this one and only useful skip lol

So this trick involves being knocked to the ground during a transition (NOT a loading transition) by a romper (the only non boss enemy able to do this) which then somehow messes with the games' collision detection with walls and doors. The following video will go more into detail and also cover romper behavior:

One thing I forgot to mention is that this is only pixel/frame perfect if stood still, you can improve your chances by actually moving towards the transition as the romper attacks you by walking, running and sometimes even quickturning on the spot there.

If the romper isn't too hot on your heels and you have time to line this up, here is your pixel perfect sweet spot (this is a PS1 game and the following was recorded losslessly in amarec, but its still pretty difficult to make out):

Upscaled Video showing the above in motion:

Bottom line: Practice this a LOT, even then its not consistent, but 1:10ish saved if first try. Good luck

Proof this doesn't work through Loading Transitions