A grown grandson is going to visit his grandmother who had recently moved to an apartment complex, so he phones her to get directions to her unit.

"I'm in apartment 908. When you come to the front door of the complex you'll see a large panel at the door. With your elbow, push button 908. Then I'll buzz you in. Enter the lobby and go to the elevator which is on the left. Get in the elevator and with your elbow, push button 9. When you get out of the elevator, look for door number 908 on the right. With your elbow, press my doorbell."

"That all sounds very easy, Grandma," says the grandson, "but why am I pressing all these buttons with my elbow?"

"You're coming empty-handed?"