dunno if anyone is still active here, but ive discovered a glitch called door clipping. essentially if you are standing between a door and close it, it will either push you out or (in rare cases) keep you in the doors. if you time it just right, you can get a boost from the door and save around .05-.1s for every clip. so doing this on a lot of doors in right positions, i saved around a second alone from it. this probably explains why i open and close doors frequently. also, using it everywhere sometimes isnt optimal as it pushes you forward, whereas sometimes you want to go right or left.
edit: also, with these clips and my splits my sum of best is 4:18.9
HOLY i just found the omega glitch, it saves 30-38 seconds. it involves going to the men's restroom and facing into the wall. you can then pull the levers to open the laboratory through the wall!
yooooo so sick, will try to get a good run with it at some point, i'll try the door cliping as well :))