The cops tried to get in touch with the theater manager and failed, but before this could become an episode of The Twilight Zone, they found an emergency exit, and Hayward finally breathed fresh air.
After explaining that this wasn’t an emergency and that he was just locked in a movie theater, two police officers arrived to see what was going on.
If this were me, at this point, I’d be wondering if a Walking Dead-type scenario hadn’t happened while I slept, but Haworth decided he’d have to call 911.