You may or may not know what a Rubik's cube is. I had one as a teen. I would just peel the stickers off and pretend I solved it. Wah wah. I have witnessed people solving this hand held puzzle for real - but not this fast. Watch as a robot solves a cube in less than 3 seconds. We are doomed! Robots will soon rule the earth. Along with Ironsnake that is, because Ironsnake always RULES!
Push-ups are one of the most tried and true methods of working out. One-armed push-ups are considerably harder, but when you start doing them with a Rubik's Cube in your other hand, you've pretty much entered Batman levels of bad-ass.