"The Accidents"

A father brought his son into the doctor because
the boy had a matchbox car shoved up his nose.

All the while the doctor was trying to remove the
car, the father kept saying "I don't know how he did it!"

Finally the doctor removed the car, and the father
and son left.

A few hours later, the father came back with the
matchbox shoved up HIS nose.

He told the doctor, "I know how he did it!"

(Thanks Joyce)