Whoa, wrong thing to say, at completely the wrong time. He tried to keep his grip on 1412, but not so tightly that the assassin would feel threatened or trapped.

"Oi oi, I don't want to trap you in here!" Kaito said, "If the door's locked, then no one out there could get in here!"

Of course, he knew perfectly well that that fact wasn't necessarily true. He could pick locks, after all. Another Kaito would be able to do the same.