While learning Bongo Hills today I found this clip through the slanted white platforms in Bongo Hills Screen 1.

I don't know if this is already known, or if this is possible with all slanted platforms in the game that have ice-physics. It happened multiple times, but so far it feels pretty random.

That's where more than a few of my Bongo Hills runs died. It's never happened to me on any other ice physics platform in the rest of my time playing this game. It seems to just be a collision error of some sort. Dealing with jank like that was one of the reasons I didn't want to push the time any lower. Anyway, in case you didn't already figure it out, I screwed up a trick in Screen 2 where you hover at just the right time to jump off a set of Bongoes a second time instead of taking damage. That's probably the most glaring error in my PB. Good luck on your runs.