Gabriel throwing the grenade back to the goblins upon his first sight of them!
"Down here, you bitch!"
Zobek also used the word "bitch" once in one of his narrations.
Gabriel's funny scream as he gets lifted to the final platform after defeating Dracolich.
Gabriel's little smirk before doing the classic "let go of the rope during tug-of-war" trick against the evil butcher.
At one point, Gabe lands on a platform to face a goblin that roars at him, then nonchalantly walks away like nothing. There's a pause, then a much bigger goblin appears behind him.
As Gabe turns a crank you can see a skeleton behind him in the distance. He cranks down, putting the skeleton offscreen, and when he comes back up, the skeleton is a bit closer. This continues until the skeleton is right on top of him, at which point, Gabe stops and looks around.