It was part of the set up.

[ The magician is pouting about how the lamp is being moved back to where it once was. ]

A magician never reveals his secrets, but for a friend, I will.

[ With a great amount of cheer, he points to the door that Rohan entered from. ] Yes, the front door. [ Clapping his hands together, he pulls it apart to show a line of his aura. ] Bungee Gum has the properties of both rubber and gum. I affixed it inside the lock and jimmied it open.