the "OH NO!" game

For months now, my kids very favorite things to play is some variation of the "OH NO!" game. It goes like this:
Hazel or Charlie: "Oh NO! I my arm (or leg, or head or foot, or toe or whole person) is gone!" (hiding their arm someplace totally obvious)
Me or Jeff: "Oh no! What will we do with a child with only one arm!? What are we going to do?"
Hazel or Charlie: "Ha Ha! Here it is!"

It's getting really old.