When the guys are talking about how they feel they're being watched...
Franklin: Yeah he's probably watching us... beating the fuck out of his dick.
And this gem:
Evan: *Shooting an alien in he head, repeatedly.* THIS IS FOR KILLING MY FRIEND, YOU STUPID FLOOTROCK!
Bob: I don't know if we can confirm or deny that this is Flootrock, but I think we can say for sure that this one's a goner.
And the part where they keep shooting the guy they think it's Flootrock like half an hour after they've killed him. Excellent example of Crosses the Line Twice.
The entire scene with guys taking pictures of the captured alien in various poses and outfits.