Litlte known one:

"I'm calling the police!" end of game screaming callout on AGBGoaWT.

The code was updated and modified by AGC to allow operators to turn this specific recorded audio OFF, because it was causing problems on routes that scared customers and caused other problems due to complaints. This was not initially considered by the manufacturer.

I actually installed an electronic air raid siren in a game once as a joke as I was reminded of Gold Wings game.

It triggered when a player received free credits with a match. Literally it was one funniest things to watch as reported by the operation owner. The person did not know if they won the lottery or to run away in fear. Ultimately, I had to pull it due to customer complaints, but it was fun while it lasted.