Not that it was likely to; nothing much at all ever happened inside of Canterlot Palace at almost three o'clock in the morning. Except maybe during the Grand Galloping Gala -- which was less than a week away! Anyways, even if there was a threat from the Rookery, the only batpony who was supposed to be in the palace was with them. The others were all flying or on guard duty outside, and from the stern expressions that the guardsponies at the RUC checkpoint gave her sergeant, Artemis got the impression that the Night Guard wasn't trusted to operate without RUC supervision either.