Out of a large number of martial arts in the world, Aikido in particular has a stronger focus on self-defense. There is a certain kind of beauty in Aikido, with the way it guides the opponent's force to defeat them.

In this video, a teacher of Aikido teaches what is probably the ultimate form of defense when someone is coming up to you with a sword.

Pretty much anyone can do it!

First, the teacher gives a wooden sword to one of his pupils. What kind of move is he going to make? Bubbling with excitement here...

Then the teacher says "go"... The student begins his move!!

Oh. Ohhhhh... The ultimate move - sprint and flee.

Well, I guess if you were unsure what to do when someone is coming up to you with a weapon, you might be better off just running the hell away.