Yamato sees the security doors start to shut a fraction of a second before Barry gets out onto the factory floor -- they're slow-moving, nowhere near fast enough to stop him, but fast enough that Yamato knows they've been caught.

The floor in question takes up a good two stories, with a walkway around the edge and, below, a mass of conveyor belts, machines, and workstations set around one vast, sprawling room.

"We're in trouble," Yamato says, as a dozen alerts flash up in Barry's location, followed by every security door in the building slamming shut and locking, and every maintenance and ventilation shaft being blocked with shutters. "I'll start working on getting stuff open, but you're going to have drones right on top of you in minutes."