Ezra jumps in surprise when the door slides shut without Garth'zel being near it at all. Whether he did it with a remote or with his abilities doesn't matter. Ezra's escape route just got cut off.

Immediately, his eyes dart around the room looking for another way to get out. There are vents, of course, but it would take too much time to get them off if Garth'zel is trying to catch him.

"You can't keep me in here!" he protests, thinking fast. If he can't get out himself, he'll have to get Garth'zel to let him out. "I can't take a bath if you do!"