Since there have never been any known and proven alien encounters, your question cannot be answered.
Predator, Alien, Aliens Vs. Predators, Predators
Aliens, the second movie.
most frightening
The word meaning "most frightening" is spelt scariest.
Extra Terrorestrial Alien Encounter - 1994 was released on: USA: 1994 (Walt Disney World)
No.
Roswell
Yes, ExtraTERRORestrial Alien Encounter closed on October 12, 2003. It was replaced by Stitch's Great Escape.
the most scariest thing in the world is bloody Mary n the graveyard and the green light coming up from a grave.
Roswell
Roswell
roswell