Best game in my collection for this is the Super Cellar Jackpot in Whirlwind. Whole time you're playing the game, bystanders will hear the various thunderclaps and maybe feel the wind, it kind of becomes background noise in the din...
...until suddenly with another shot same as others before, the game suddenly goes dark and eerily quiet for a second, then you hear the knocking on the cellar door followed by
BOOOOM! BOOOOM! BOOOOM! BOOOOM! BOOOOM! BOOOOM! BOOOOM!
...each with commensurate lightning flashes and a countdown of the individual bonus award boxes under the display... as a player it's intense, and the sustained countdown racket is *guaranteed* to get everyone's attention!
