 PLOT: SPOILER: When Dr. Bennell leaves Becky Driscoll momentarily in  the cave while he investigates the music they hear, Becky begins to  fall asleep. Upon Dr. Bennell return he attempts to escape while  carrying her as she is so tired she can barely walk. She falls  asleep in his arms and wakes up instantly as one of the aliens  invaders. This is a goof as it had been previously established that  when the pods are fully formed and the original falls asleep they  would absolve all their memories and dispose of the original person  and kill them. This was not the case for Becky Driscoll.