Havelock raises his eyebrows at Puck's rather specific fastidiousness, but is more than happy to duck after him into the room, and slam the door after them both.

...Then he leans his whole weight against it, and glances at Puck once more.

"Try and lock it?" he suggests with some urgency.

A heavy weight slams into it from the other side, throwing him off balance, but he regains his footing and leans back hard once more.