I am not an airshow pilot and I could do it comfortably. The hijackers? They obviously didn't find it insurmountable either. All of them were commercial licenced with differing amounts of flying time. Get yourself a copy of Flight Simulator, George. Plug in the details of the day and see how many times it takes you to be able to do it. These pilots knew what they had to do and probably practiced the same way. Flight Sim is actually very good for that sort of thing.