Growing Pains

A young boy was lying in bed one night when he felt a pain in his leg. He tried to sleep but unable to he decided to go to his parents room. He explained the problem to his parents and so his dad told him that it was probably growing pains. This put the boy's mind at rest and he went back to bed. After laying there for a while, however, he began to think about it. The pain is only in the one leg!