I figure the plane will be quite a bit above the end of the tarp when it flies over it.

BTW, consider the problem of that truck dragging that tarp relative to the airplane. The tarp didn't look a lot wider than the spread of the tires. The airplane might not take off straight straight down the runway. And the tarp might not drag straight back. That ought to cause the airplane no problems from roll resistance but might cause the truck problems or affect the way the tarp is staying under the tires until they lift off. Unless the truck's drawbar is at ground level, it'll be pulling the tarp up from where the weight of the plane is on it. And the part that will come up will be under the tailwheel. The tarp will try to draw a straight line from where the mains pin it to the ground back to the drawbar. The problem will lessen as the truck moves away from the plane. But if the tarp tries to lift between the mains and the truck it's going to be lifting the tailwheel.

I'm betting the airplane is a STOL. And the pilot is an idiot. Rolling forward off a treadmill that's setup at ground level would pose no problems. The MYTHBOOSTERS tarp deal is ridiculous and nothing but a problem.

I wonder if they even know to take off into the wind?