Flipper coin. Again, I shall take my leave.
Leave the dungeon door unlocked.
He doesn't like to be left hanging.
In a think tank
A reservation reservation reservation. Credit to Brian Regan, this is my favorite joke of his!
They're scared of Wales.
Sir. Groan worthy penguin jokes(https://allwrong.wordpress.com/2007/10/05/penguin-riddles/)
Flipper coin!