The most common issue is the spacebar stops responding here, but this is the most consistent position I could find for that. Still can't find a consistent spot for the full physics stuck bug. lol
Just stand here (note the position of the right horn and the tree trunk - not aligned perfectly, about one full tap of the right key and then face left again) then do a full click jump holding no other buttons. If done right all animations on the character stop and he just stands there. You can still move left and right here, but if you clip just right (very hard to reproduce, like 1 in 100 jumps) he gets stuck completely in the wall, but it only lasts about 2 seconds. I've tried screen capturing it, but he's always out before it takes. Sorry.