Again, no coin was used, I checked the event list on the left hand side of the battle map both times, thinking maybe the graphic for the coin bugged out, but it's not in the event list either, and they played the coin later on that game. Needless to say I whomped their butts anyway, but still... MAGE POWER!! :D
I have never done it myself, but it has happened to me twice against two different opponents. I checked through all of the patch notes, no mention of this. I figured I'd bring it here, see if anyone else encountered this. Is this a static, manipulable bug?