This does not go in Help, it's a bug I've been unable to reproduce.
Anyway, basically this is what happened:
I fake-killed a tree, jumped on it, and it started glitching out in my feet. It then puffed up to about double its size and disappeared. I saw this in the console afterward.
For the 5 years I've been jumping on bricks, this has never happened. Has anyone else
ever experienced this?