Worst Idea That You Ever Had As A Kid

I grew up on a farm and my father told me when I was young that one wouldn't get shocked by an electric fence if you first grabbed a hold of someone else, then touched the electric fence.  The electricity would flow through me and shock the other person.

I thought that was an awesome way to pick on my brother without getting shocked....let me warn you, this does not work (Probably still the reason that my parents didn't think I was the brightest bulb in the drawer).

What are some of the worst Ideas that you had as a kid....I had a friend who jumped off the 2nd floor of his house holding a sheet as a parachute, thinking he would float to the ground....nope he floated into the emergency room after breaking both of his legs.