Wet.
A spooksman!
He was afraid that if he sat down that someone would give him an oar to row!
Disclaimer: I don't know how well this joke will work in English. What's yellow and lies in a pond? An excevator. You don't think this is funny? Neither does the operator.
Very Quackly
1. wets toothbrush 2. puts toothpaste on toothbrush 3. wets toothbrush again 4. does backflip on to huge pile of money