I think George, Coco, Louise and Terry have understood better than me .

I was with Louise but don't tell Coco Terry was with George and they can now marry legally

Better take out a note and write it down Interesting explanation but i kinda get the feeling that the person doing this video is pretty alone

This makes my brain melt. Please will somebody explain what's going on?

An engineer's interpretation of the Michael Jackson Moonwalk

basically the big wheel is rolling on the ruller. the smaller wheels upposite spin cause the free movement of the big wheel on the surface below. the difference in speed is caused by the size difference between the wheels which act as gears.
so: ruller turns the big wheel backwards, the big wheel turns the smaller wheels forward much faster and cause movement of the big wheel forward faster than the ruller.

I think the fact that the ruler is not be exactly horizontal may also affect the "trick"...

#6 if you have a background in engineering, you can simply look at the equilibrium of the contact-forces, considering the kinematic constraints (transmission) to figure out which way the wheels will react to an external force. If not, well, you have a lot of studying to do if you really want to understand it.

fake... proven by a scientist.

I fancy Louise, she's a doll!