I never even thought about that.
First thing I notice. AGES ago, when we were kids (and dinos were around) we tried filming something with a heli.. It was awful.. We'd burst out laughing, and then even when we didn't, the rotors were still, so it just looked silly..
Have no idea if that recording is still somewhere. One day I will have to find the 2 large dios we filmed in the livingroom, over 2 long weekends when we were home alone.. A medieval one and a recent one...