by mess i mean, there are eyewitnesses who saw them, there are lots of evidence they where here, i was always in the understanding that Predators wanted to be Hidden from others, these are supposed to be trials for them in their tribes, but it shows us they failed, more P2 with Danny Glover killing the alien ahem the Predator, obviously the Elders who showed up at the end would be displeased witht he outcome and only reason He was not killed was because he killed one of their own who was not worthy, again P1 had to sacrifice himself to not loose, i dont consider that a victory, all in all they left a big mess here on earth and someone needs to come down and clean it up