Ninjas are cunning foes. The purpose of the ninja is to flip out and kill people. Foolish Canadians learned this valuable lesson after challenging one ninja and being ambushed by scores of the deadly assassins.

If you see a ninja on the street, walk away. Because either they'll slice you up into little bits, or it'll be an improv group and they'll make sure all your friends know you're afraid of fake swords wielded by actors. Which is actually worse than being killed by a ninja. (Improve Toronto via reddit)