After she has fallen down the hole (if u mean in the train) have the guy go to the second floor and head toward the end of the train. Soon you will earn an ice pick and head to the room where the dumbwaiter is, but be careful because a giant scorpian will attack u on the way. When u get to the dumbwaiter put the ice pick in it and send it up to Rebecca. Use the ice pick to unlock the door and brake free!