I completely forgot about both instances. But then wouldn't that mean that Mat died three times, twice when Rand used Balefire to save him, and once when he was hanged from the tree? I still can't help feeling like it is that third one that is the most important, and most miraculous, since we still don't know what exactly Rand did, or what was done to Mat to enable him to return to life. The Balefire incidents are just good examples of why absolute rules are never a good idea.