Once the characters have all arrived at the cabin in the woods, there is a scene during a game of "Truth or Dare" where they all enter the basement. During that scene, Jesse Williams' character "Holden" magically acquires glasses that he was not wearing at any point prior. From that point on, throughout the remainder of the movie, his glasses disappear and re-appear multiple times. Most notably, in the scene where three of them attempt to flee through the stone tunnel in the RV.