Not enough mass. The airliners were wide bodies and were fully fueled at the time of impact. Thats like 9,000 gallons of fuel. Imagine how heavy it is to carry a 1 gallon jug of milk, imagine how much 9,000 of those would feel. You wouldn’t want to try to catch a full 1 gallon jug of milk if I tossed it down from a 3rd story window, right? Now imagine that gallon of milk moving 3-4 times as fast…now multiply that by 9,000.

That roadster is going to be out of fuel by time it gets up to the 100th floor. Amateurs.