If Spider were here, we'd be at it all night (yes, I know how that sounded).
After a rough patrol on Christmas night, Batman goes to his room to find a surprise Christmas present in the form of Talia covered only in wrapping ribbon.
Or
A JLA Christmas party where everyone gets drunk off of Plasticman's special eggnog and end up sneaking into JSA HQ and graffitiing its walls with thousands of newly developed polaroids that show their bare asses with the printing, "Merry Christmas" on em'.