The first time I heard of Shazam was on a road trip with a friend of mine who had minimal tech skills at best. I was already 10 years into my career as an engineer, and when he told me about it, I honestly didn't believe him; I was positive he was mistaken, and speculated it was a service similar to Aardvark[1], which was a peer-to-peer information engine.

I was wrong, of course, Shazam really did live up to its hype. I think it's interesting that the someone knows about how a technology works the more sceptical they are of what it is capable of.

[1] https://en.wikipedia.org/wiki/Aardvark_(search_engine)