traffic jam

A driver is stuck in a traffic jam on the highway. Nothing is moving.
Suddenly a man knocks on the window. The driver rolls down his window
and asks "What happened?"

"Terrorists kidnapped President Bush and are asking for a $10 million
ransom. Otherwise they are going to douse him with gasoline and set him
on fire. We are going from car to car to take up a collection."

The driver asks, "How much is everyone giving on average?"

"About a gallon."

(courtesy of c.e.s.)