I heard this joke from a Readers Digest Magazine. I'll do my best to remember how it was.

A father, Mother and son went to the mall one day because none of them had been to a mall before and the mother wanted all of them to go.

While the father and son were waiting on the mother, the father was watching this strange piece of equipment that would open up, people would step inside then they would disappear (elevator).

As the father was watching it, he saw and old woman in a wheelchair go into the piece of equipment and disappear. After a few seconds, the doors opened, and a young blonde stepped out of the strange device and walked away.

In complete amazement the father turned to his son and said,
Boy go get your mother.

Hope you liked it.