on a Roadshow, did not realize the switch at the top of the falling rocks habit trail existed. I kept thinking that it was not really much of a skill shot to get the extra ball when lit, since you can plunge it hard and have it roll back. Forget how I finally realized it was there and broken. One of those, duh, moments -- it made no sense, so why did I never look at it.
I also had same flasher in the LOTR ring. Was playing someone else's and thought, I don't remember that flashing. Bet that happens a lot that the bulb gets smashed.