Which caused hamster to go into a frenzy, jump off wheel, and begin devouring janitor. This in turn caused wheel to stall, and much panic in the internetz.
Actually, the Janitor unplugged the server to run the floor buffer. That started that chaotic event. Server ran on UPS batteries, janitor lay in a pool of blood and never got to plug the server back in before UPS batteries ran out.
Since the Janitor is now room temperature, this can be considered the last time this happens.