Bruce didn't get a chance to object to 'down here occasionally'. Instead he looked hopelessly around his cave for a moment and then bolted upstairs and into the Mansion.

He actually left his work on the table.

He kept bolting until he was at Jason's door, where he knocked loudly so as to not interrupt, frankly, masturbation sessions likely to be happening in any teenager's room.

He didn't wait for the answer, either. "Get dressed and get downstairs, fast. We're leaving early."