Found on Church of the Front Porch:

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."