Untaught mechanics in Celeste: interactions

I've been recently thinking about a series of tutorials/showcases of mechanics or tricks that the game never teaches you, but could be very useful for players who would love to either learn a little bit more about the game or to get better at certain aspects of it.

The first one shows a few mechanics that have mostly to do with either interacting with Madeline or certain objects. Some of them may be known already by some people, but I think it still would be rather informative for more casual players.

Timestamps:
0:00 - coyote time
0:43 - corner correction
1:41 - buffering inputs
2:31 - bumper/fish boosts
3:29 - conserved wall jumps, aka "extended wall jumping"
4:47 - corner climb jumps
5:39 - ceiling pops
7:20 - screen transitions