Wizards recently changed the ruling for double faced cards:
if a DFC has an activated or triggered ability that transforms it, that permanent transforms only if it hasn't since that ability was put on the stack.
Ok, so that means that you can't flip-flop a DFC card around with the ability on one side. Does that mean you can't activate/trigger the ability more than once, for other effects? (e.g. Elusive Tormentor's "{1}, Discard a card: Transform" and I want multiple Madness triggers)