After they survive the car explosion, the waslk to a motel and Rubin say "Something tells me the earth is gonna need me", then later as a flashback it goes to that scene, only it shows him saying it a couple of seconds after he really said it, and his lips aren't moving. And later, when Josh is having a dream about the tape being scene by Tiffany, Rachel's voice on the tape is totally different than when it was recorded, and the timing is way off as well.