Needs work, but the concept is great.

http://suidobashijuko.jp/

Why?

I've seen news reports where there are a couple of robotic companies trying to perfect a small version for ppl with spinal cord injuries so they can walk again. The difference obviously is that instead of wheels as the main propulsion the legs actually work. The Asimo project, which is Honda's robot, took 20 years to perfect the walking, that robot can walk up and down stairs, uneven terrain, etc.

All you need to do is smile to kill your enemies lol

Hhaha "the smile shot"