The result when multiple balls are in the same vertical upkicker (VUK) and the game can’t get them out.
This can result in the vertical upkicker repeatedly trying to pop them out until either:
- the game gives up and produces an operator error
- you try to nudge the game to force them out
- you have to open the game or turn off the machine to free them.
Example of games where clustervuks are likely to happen: Spider-man, Lord of the Rings, Batman Dark Knight
Fun With Bonus is the home of the semi-coherent, misguided ramblings of professional and amateur pinball players.