Sorry, I just remembered another one from last night.
I was doing my version of Dr Daley's Last Trick with two guys. They were really nice guys and really up for a good time. When I came to reveal that the two aces in my hand change places with the aces in his I asked him "Sorry, I've forgotten; which cards did you have?" (with a little bit of a cheeky grin

"Oh no, you didn't. You didn't. You didn't! (he peeked inside his hands) AHHHHHHH! You did! I hate you!!"
It was probably the best reaction I had all night, we just sat there laughing about it.