Dark Rides: Magic for the Other Senses.

“The joy – and terror – of Alien Encounter is that the entire experience is in your head. You can’t escape it by shutting your eyes. In fact, shutting your eyes will do very little. Now that the alien was escaped, the rest of the attraction takes place in absolute pitch black darkness.”

http://www.themeparktourist.com/features/20150310/30034/depth-retrospective-extraterrorestrial-alien-encounter