It continually goes around and around, both hands without stop for about 15 minutes? Btw, this is a wall clock.
It doesn’t do this twice a year though, as I said it never did this again.
At the time we did replace the battery. While the battery was out the clock was doing nothing. When we replaced the battery it went right back to doing it.
I’ve seen mine do this spinning thing like you describe once. I think what was happening was loss of radio signal so the clock kept spinning because it had nothing to tell it to stop here.