He had gotten too comfortable on his search, and the unexpected voice made Tony startle enough to rattle the instruments on the tray he carried, undercutting the casual glance he threw York's way. He had swiftly tucked the bottle against his palm, then smoothly added it to his collection as he turned back to the cupboard to continue his assessment of the contents like his shoulders hadn't gone tense under observation, he was totally supposed to be here. "If you've got a better party invitation, I'm open to a change of plans," he replied. When he glanced over his shoulder a second time, it was with a look of skepticism, eyes tracking over York like he could see what he was hiding. "Doctor's not in," he reported. "But if you're just here to try out a humiliating human experience, I've been through a few checkups in my time, I could be convincing."