It looked like the first crane was just too small no matter what was done. I think he was lifting over the side trying for every last inch of clearance he could get, look at how close the front of that car is to the wall in the 2nd picture. It must have tipped when they started swinging it, otherwise I can't imagine that it would have even picked the car up at all. Over the front or over the rear would have been better as far as stability, but overall they should have just started off with a bigger crane.
From the way their day was going I did expect to see the big one fall into the water while trying to rescue the small one though...
That kind of day just plain bites.
Mike