I know this will show what a dork I am, but....
A local dealer has one of these and I never seem to tire of watching the retrograde motion when the minutes switches from 59->00. Furthermore, if you are really lucky you can watch the minutes and hours switch from far right to left. Sometimes when at a listening event at the store (lasts several hours) and the clock is in the same room, I get multiple shots to watch the swing-back.
Yeah, I know. Big deal. ;-)