There's a lull in the action (it's been a little while since Calvin's had to watch anyone get murdered) and his stomach has started to unknot. It helps when he looks around at the faces of his classmates and friends, just to take himself out of the film for a moment. It reminds him where he really is, far(-ish) from any demons (maybe). Micah, sitting next to him, is completely engrossed in the moving images. He doesn't even look down as he lifts a piece of popcorn to his lips.

Calvin reaches over and steals some for himself, not even trying to be sneaky. When Micah looks over, Calvin smiles smugly and pops one of the stolen kernels into his mouth.