Ever wondered why The Beatles song 'He Majesty' is on the end of Abbey Road?
Not only that there's a 15 second gap before it plays.
Was this a mistake?
Maybe, maybe not but it wasn't even listed on the original release.
Therefore, it may be the first example of a 'hidden' track on an album.
Well it was supposed to be a part of the medley between 'Mean Mr. Mustard' and 'Polythene Pam' but Paul McCartney didn't like it there so asked that it be thrown away.
Of course, you never throw anything away by The Fab Four and they didn't, luckily for us fans.
Here is an audio explanation of why this track ended up where it did - at the end of The End

You may like another example so here's a video too: