Chaps, you're absolutely right about the difficulty of judging the height of a moving aircraft from the ground; it's hard enough from the air sometimes! My only real concern is that if the pilot's skills at steep turns (very impressive, actually) weren't matched by his ability to control the aircraft if an engine failed then *I* was the one likely to be in trouble, not him.
Never having flown a Seneca, or indeed anything with quite that many engines, I have only a vague idea of what's likely to happen if an engine drops out while in a 60 degree bank at (say) 1000'. Would anybody with more experience care to comment on whether this would be a big deal or not?
-C