A supermarket worker I know gets very grumpy at Christmas.
Can't be as bad as the music played over 'racing camels', you roll balls up a slope to drop them down holes and your camel moves forward depending on the value of the hole. A tune (I use the word loosely) about 30 seconds long is played continuously. Imagine working with that!
www.youtube.com/watch?v=D8HXW9ljjR4
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