The last time I went to a quiz night our team drew with another. So an elected member from both teams, me in our case had to go out to the front and stand back to back with each other.
The question was, 'In the Yin and Yang symbol, which colour is Yin? Raise your right hand for Black and your left hand for White. Ready steady, go'
I won, so our team won but I can't for the life of me remember which hand I lifted.