Cid would shrug it off. Make alien hands and say ghosts before he move on to whatever he needed to do (or help a customer).
It was around closing that Oliver would notice it. The stranger than normal noises in the basement that sounded like happy chitters.
... and when he went to investigate, he'd find himself in the other ashdown version of the shop. Which, surprisingly enough, was actually an old, faded replica of it's actual self.
Melancholies