Ah, ok. I once went to science museum where they had you listen to a sound and then you had to guess what actually made the sound. Like, was it popcorn or fireworks? Rain or frying bacon? Those are the only two I remember.

It's a Warehouse 13, Myka/HG fic, which I think is relevant to your interests? Now I'm nervous. Ack. People are actually going to listen to this one. Maybe it should never see the light of day.