Foreshadowing
Max bites the cousin that gets eaten by Der Klown.
Day 23 Max opens his advent calendar and there's a snowman picture. He looks out the window... there's a snowman outside.
Omi "that to believe in him (Santa Claus) is to believe in the true spirit of the holiday. The b spirit of giving and of sacrifice..."
There is something about her line in the kitchen seems very key to the whole movie...
The skewered cookie at Derrick's.