In Predator 2 , the antique flintlock pistol given by the leader of the group of predators to Harrigan is proof of the existence of predators for several millennia .
More Predators suddenly appear and collect their dead comrade , while the leader of the group presents Harrigan with an antique flintlock pistol as a trophy , proving that these beings have been around for untold millennia now .
Predator 2