When someone buys a song on iTunes or any other music service too quickly to realize that they bought the wrong song (i.e. a cover band, the song was played in a band entirely made of instruments, or the song has the same name)
Guy1: Oh crap! I tried to download "In the End" by Linkin Park, but instead I got the song by the Foo Fighters
Guy2: That's a really bad trackcident man.