Yep, I read that part after posting.
What still confuses me is that he was able to get in through the fire door.
Unless it was some shitty theater that violated a bunch of codes, afaik those doors only open from inside out, are metal, and have a lip that prevents them from being forced open. I don’t think it should be possible to kick one in. Maybe those were double doors? I suppose it’s possible that he actually propped the door open prior and didn’t have to kick anything in at all.