He entered the theater, bought a ticket and was dressed like everyone else. Went in, sat down and once the movie started, got up and went out the fire exit - blocked the door so he could get back in - went to his car (parked next to the exit) and suited up, then re-entered.
For this reason, I expect fire exits to soon be alarmed and available only for emergencies. I predict there will soon be no more exiting out the front of the theater. As far as I'm concerned, that's the way it should have been before now.