Ok, so earlier this week I commented that alarm[12] can be used as a cheap countdown timer without requiring an alarm event for it. Turns out I was wrong; it is in fact alarm[0]. I haven't tested if alarms cycle, making alarm[13] be alarm[1] or if all unused alarms are alarm[0], but the fact of the matter is you can't use alarm[12].

Damn, and I was so looking forward to it.