Anyway, here we go. This is of course an incomplete list, please add to it in the comments!
- Ep2-01: Acceptance
- House and Stacy are discussing House's latest trick. Just before the elevator doors close with House inside it, House stops the door with his cane, to ask Stacy a question. It is a pretty neat way to continue a scene that you thought was over, isn't it?
- Ep2-07: Hunting
- Cameron gets on the elevator looking rather worse for wear. Just before the doors close, House's cane clangs between the gap. House and rat get on elevator.
- Ep2-16: Safe
- Following on from Wilson's subterfuge to let House get a better 'look' at a patient, House uses his cane like a limbo stick to block the elevator entrance. Foreman slips under it, but the rest aren't so lucky, as a hospital bed is taking up the rest of the space. House also uses the cane to fend off Foreman when he tries to turn off the emergency stop House activated.