I thought I had seen something like this before for a different holiday, but now I can't find it in a search. Apologies if this is well known...
So if you bail on a fail dungeon group(not getting deserter, for example you get stonecore in progress on Ozruk, and the tank likes to stand in shatter), and still have a 15 minute dungeon cooldown, You can simply queue for the holiday boss, down it(takes <5 min.) and your timer is reset, letting you queue for a new heroic.
*note*The holiday boss screen in the dungeon finder tool will show the cooldown timer when you first queue, but you can still click the queue button.
edit: really not very useful for DPS, because of the long queue time.