When the big hand touches the little hand.
They were both driving their cars at the time!
If you don't pull out in time, it will cost you a lot of money. My boss said he made this up on the spot yesterday. Never heard it before so I figured I'd post it.
Don't touch my booty
The big hand touches the little hand.
When the big hand touches the little one.
The big hand's touching the little hand.