[Tuj] Yes, that's the surprise. Opposite foot and hand don't interfere. I wonder if organists would find it easier, having learned to make their hands and feet work independently.
[Raak] Took a bit of effort but I was able to do it after a few tries. I found the trick was to set the hand going until you no longer thought about it, and then concentrated on the foot moving in the opposite direction.
As for organists, I don't think they'd find it much easier, because the movements they make with their feet aren't hugely complicated - as far as I know, no more complicated than those a driver makes in a car with the pedals.
[nights] s'often the way. You nearly done, exam-wise? [btw - my comment above which you queried - I was referring to the word 'I' [as in first person] which you always capitalise, even if the rest of the sentence is lower case :-)]
It disturbs me that the assessment aspect of degree programmes is given so much prominence these days. I say this both from empathy with the students, and as one of the people who has to mark the bloody things.