It's technically arriving a year late, but Paul Simon's landmark 1986 album 'Graceland' is celebrating its 25th anniversary this summer with a deluxe box set reissue and a new retrospective documentary, 'Under African Skies.' In a new clip from the film, Simon discusses the creative process behind the album.

As Simon recalls in the clip, the creation of 'Graceland' started with a trip to South Africa, during which he and engineer Roy Halee recorded a 10-day series of jam sessions featuring some of the country's finest musicians, including guitarist Ray Phiri and the vocal group Ladysmith Black Mambazo.

What Simon ended up with was a lot of unformed music, but nothing he could consider a song for the purposes of his album -- so he returned to New York and set about shaping those performances into the tracks that ended up making the final cut. In this particular clip, embedded below, Simon talks about how that process led to the album's leadoff track, 'The Boy in the Bubble.'

Watch it here, and keep an eye out for the various anniversary editions of 'Graceland,' including the straight reissue, the deluxe box (offered exclusively through Amazon), and a new vinyl edition that's scheduled to arrive in time for Record Store Day (April 21).

Paul Simon discusses the origin of 'The Boy in the Bubble'