[It's a conspicuously absent invitation. Better than the alternative of today, but still, Papyrus squints at him for a moment before grumbling.] Just you and a bunch of ghosts, huh? I guess I can be computer backup. Listening to police scanners... Let you know if anyone notices your illegal entry. [It's not like Sans getting into this constitutes breaking and entering, unless the stuff he plans to leave is broken stuff, in which case it's more entering and breaking.]