2 Mad Men

There were two guys locked in a lunatic asylum, and one night, they decided they didn't like that anymore and tried to escape.

They made it up to the roof. Just across this narrow gap, they see rooftops stretching across towns. The first guy jumps right across with no problem. But his friend couldn't jump because he was afraid of falling.

So the first guy said, "I have a flashlight with me, I will shine it across the gap between the buildings and you can walk across the beam and join me."

But the second guy said, "Do you think I'm stupid?! You will turn the flashlight off when I'm halfway across."