Tom Penny's bs nollie in Chickens pool in Really Sorry is the best I've ever see done on transition to this day. Most people who do backside nollies on transition either bonk the front wheels off the coping or pop it off the transition and rotate 180 degrees on the spot. Penny's is unique that he pops off the transition properly, but he drifts the rotation. Never seen anyone else do that.
Edit: No one seems to cite this trick either. Maybe overlooked in its subtlety, but fuck it would be hard to do one like that. Particularly in a pool.