The Wolverines taking food from a Subway, mostly because of how completely random it is.
The Eckert brothers tricking Robert into drinking deer's blood.
One of the Wolverines, Daryl, makes a Call of Duty: Modern Warfare reference. In response, another says, "Dude, we're living Call of Duty. And it sucks."
Which is actually pretty funny considering the fact that one of the achievements in Modern Warfare 2 is a reference to Red Dawn 1984, as well as the fact that the sixth mission of the game is called "Wolverines!"