All I can say is "I'm impressed." 

I could probably manage following like that in a 10-wheeler, but how do you judge the distance from the chopper?  The tractor cab is much narrower then the box, so you're looking back at an angle and the chopper is competely hidden.  At least with a truck you could see past the drivers side and see the end of the head. 

Like I said, I'm impressed.   Oh, did I already say that?