It doesn't take a leap of intellect to realise that an aeroplane has a lot of inertia. It doesn't want to move in the first place, and once it is moving, it wants to keep going at that speed, and in that direction. So if you are towing and you are coming to a turn, I guess you don't try and brake otherwise you will have have an aeroplane taking your rear in the direction it was originally going? Lots of truck drivers regularly discover this. And if it is wet as well? Definitely no accelerating or braking in a turn. But aeroplanes are big and look heavy and stable, but this 737 only weighed about 35 tons. I'm afraid so often I look at aeroplanes being towed around empty, and very often I comment and watch waiting for the inevitable, which the ground crews regularly ensure happens. I'm afraid in civil aviation, I think this is the last remaining area where operations are appallingly slapdash.