You're walking through the park, and you see a person dressed as a ninja, face mask and all. He stands perfectly still, a cardboard sign at his feet with the words, "Fight Me" -- would you?

Those who did are in for a quite a surprise, but this is possibly the best prank ever - truly awesome pranks can be sans blood, gore, and terror. We think that all things considering, everyone who tried took it well. We would definitely try.