A little boy was playing with a worm one day at his grandpa's house. Grandpa jokingly tells the young boy that he'll give him ten dollars if he can stick the worm back into the worm hole. After a few minutes of trying the boy leaves then returns with a can of hair spray. He sprays it all over the worm and when the worms becomes stiff he pokes it back down in the hole. A few days later the boy is at his grandpa's house again when grandpa wheels out a shiny new bike and gives it to his grandson along with ten dollars.

The boy says, "but grandpa you only promised me ten dollars."

The grandpa replies, " I know....... the bike is from your grandmother."