RiNkY said something about the engines sucking air and then turning the wheels or something...

Nobody here actually believes there is any sort of gearing or linkage directly to the wheels from the engines of a jet plane.

Do they?

How in the hell would a float plane take off then? They have no wheels at all!

What if the treadmill were made of ice and the plane had skates instead of wheels? The plane would still have no forward motion relative to a bystander, but if you turned on the engines... WHOOSH, it would most certainly move forward and fly.