Here's a cool project, that I wish I would've made as a student: a motion detecting paintball sentry gun. Now this is what I call a great idea! This guy, actually made it to work properly, and it also has decent reaction times! Enjoy this demo video!

This little robot has a very big heart. In these two videos it pulls a Hummer, and climbs some stairs with a human on its back. The secret to all this torque, is transmitting the power to the ground through those 4 independently moving tracks which help a great deal. The other problem I see is the battery, because I don't think you can do anything with it after any of these cool little tricks.

I've got to say, that those little guys pack in some moves. They probably aren't autonomous, but the moves they pull, and the fact that they get up extremely easy, compensates for it. Really cool, and impressive moves!