Scared

There's no shortage of things that can freak out kids -- the dark, the first day of school, cutting nails. Here's another.

The next time you think it would be funny to scare the living daylights out of someone, you might want to consider this: medical experts say that an intense fright can severely stun the heart, enough even to kill a perfectly healthy human being.

We don't know which challenge would be greater in this scenario -- conquering your fears or conquering your bowels. Regardless, this brave man, Josh, managed to do both when his buddy took him up in the air for an "aerobatics" flight, after learning that he's afraid of flying.

This Norwegian guy is a real fraidy-cat.