He knew that it was all going to go to shit. Jackson may have control, in theory, but he's also an asshole whose worst trait is letting fear get the better of him. He may not admit it, but Jackson is terrified of anyone and anything that could be even remotely stronger than he is. And there's a lot in this city that fits the bill.

The full moon means Derek is on patrol, in a way. Stiles is back at the cabin and Derek is walking through the woods when he hears the roar. Perfect. He takes a moment, rolls his eyes, and then starts moving forward, running in Jackson's direction. The teenager is an omega through and through.