Unknown One day this man was jumping up and down on a manhole cover screaming at the top of his lungs,

Unknown

One day this man was jumping up and down on a manhole
cover screaming at the top of his lungs, "Seventeen!!
Seventeen!!"

Intrigued by the man's insane behavior, another man walks
over to him and asks why he is doing that. The first man
responded, "It's a blast. You have to try it. Jump as high as you
can and scream 'Seventeen!!' as loud as humanly possible.
You get such a rush. Try it."

Reluctantly, the second man gets on the manhole cover
and barely hops and says, "Seventeen?" very timidly.

The first one says, "No, no, no. You're doing it wrong. Jump
higher. Yell louder."

So, the second man begins jumping a little higher and
speaking louder than normal. Finally he says, "Hey, you
know, I am getting a little bit of a rush. Seventeen!!
Seventeen!!"

The man jumps higher and higher, screaming louder
and louder. The first man, once the second had jumped
high enough, yanked the manhole cover out from under
the second, causing him to fall down the manhole.

The first one man replaced the cover and, once again,
began jumping and screaming, "Eighteen!! Eighteen!!"