BRL - assuming that you were "going straight up", what stalled?
It couldn't have been the wing as it would be in a zero G situation and every ATPL stude and aerobatic pilot knows that Vs is a dependent upon the magnitude of G (or the root of G, if memory serves me right). Therefore zero G = no stall possible
Must have been the engine, eh?
Very poorly named maneover, the stall turn!
Having never flown a Robin but seen a few do quite well at beginner and standard level competitions, can you remember how much height you gained from S&L after the loop to the point when Paulo gave it left welly and right fwd stick ?