Trivia: When Rory is walking down the street wearing the Predator mask, there is a bright red/orange alien walking toward him. This is a nod to the original Predator costume that looked like a big bug, the red/orange color was used to film the stealth camouflage scenes. The bug suit was scrapped after a few test shots proved how silly it looked. Jean-Claude Van Damme was in the original costume, but he was let go when the costume was scrapped. (00:45:20)





Answer: The Predator had landed in the middle of a group of hostile Earth soldiers, who it judged would likely have just shot it immediately. It would have defended itself. And there's also the fact that it could just be for fun because, hey, old habits die hard.