[ It would have been funny if he had the foresight of putting the doorway where an open window is, but it's too late for that. ]

Alright, alright, you caught me! No tricks this time!

[ He hands back the doorknob, and dispels the illusion, invisible doorway turning back to its normal closed doorway. ]

Ah- I did have a screwdriver, but I've returned it to the RA! Stealing is wrong, after all!

[ Returning it right away with nobody being any the wiser means it's not stealing. ]