So....thanks for the replies guys. You blokes crack me up! I'm an instructor too but have never come across this one before. I agree that the whole exercise seems to have no value still, I try to please and if I can some up with some sort of half-baked answer then all the better - at least I've tried. As to the value of questions like this, I too wonder. Maybe you're right that the CFI just thinks too much of himself and wants to show how much better he is than little old me. Who knows. He's got decades more experience than I do so I just accept what he says and ask you blokes for advice now again. Hope that's ok with you!
Thanks to all who replied.
Regards.....