I remember a few years ago, a store in the local mall had these really
wild wall clocks near its entrance. There were three of them, all the
same. The clocks were unique because every so often, they would go
from showing the correct time, to doing all sorts of crazy movements
with the minute and hour hands. They sometimes would spin around
really fast, go in reverse, "bounce" in opposite directions, etc. and
then eventually go back to showing the current time.

I don't remember the store, and its long gone. The clocks were analog
(with hour and minute hands).

I'm trying to find a source for these clocks, so any information on
the manufaturer, a seller, some pricing, or a web site would be really
helpful.