Mike and Rob were laying tiles on a roof when a sudden gust of wind came and knocked down their ladder.

"I have an idea," said Mike. "Well throw you down, and then you can pick up the ladder."

"What, do you think Im stupid?" Rob replied." I have an idea. Ill shine my flashlight, and you can climb down on the beam of light."

"What, do you think Im stupid?" Mike answers. "Youll just turn off the flashlight when Im halfway there."