I am very sorry for how insanely close to my mouth my mic was.

ALSO, when I referred to getting "insanely lucky", I was talking about getting an ammo drop on the first two bosses, then getting a better weapon on the next rainbow chest. I was NOT referring to the clip; it is actually quite reasonably easy to do.

So far, it only seems to work downwards, but you pretty much just dodge roll at just the right time, and you can skip the door animation. I haven't seen any other videos referencing this, so this may be new tech. My discord is Tito, Dick Dickgirl Baby#2473

I have trouble doing this consistently, but I can do it every now and then with relative ease. If anybody knows how to do this more consistently, PLEASE tell me!!!

This isn't really a new speedtech, it's just a "bug" in the game, when you have specifically those downwards boss entrances it just doesnt play the animation, I've also only seen this kind of an entrance in boss rush. It's basically a free 1 or so second save on a boss rush run if you get lucky with it.

ahhhh ok. still, is there any downside for going for them?

If you get that specific corridor setup then its cool and a free slight time save, otherwise it just doesnt matter, you shouldnt aim for them specifically.