Okay, if this one doesn't blow your mind, nothing will.
First of all, take a listen to the unidentified mp3 below. All I will say about it is that it's the work of a fairly significant figure in rock history, and that it's a mostly dismissed-at-the-time cut on what is generally considered to be his best solo album.
Sounds like The Clash, right? I mean, EXACTLY like The Clash...specifically The Clash circa "Should I Stay or Should I Go?" in 1982.
Well, it's not. And, in fact, at the time it was recorded, in early 1976, The Clash hadn't even played their first gig as a band, let alone begun work on their debut album.
Trust me -- when you finally Google it and figure out who it is, your jaw is going to drop around the vicinity of your ankles.
[h/t Willard's Wormholes]