Mike and Rob were laying tile on a roof when a sudden gust of wind came and knocked down their ladder. I have an idea said Mike. We ll throw you down and then you can pick up the ladder. What do you think I m stupid Rob replied. I have an idea. I ll shine my flashlight and you can climb down on the beam of light. What do you think I m stupid Mike answers. You ll just turn off the flashlight when I m halfway there.