Jay-Z has shared his experience of New York's subway system in a new online documentary film, which shows him chatting with an old lady on his way to a gig in Brooklyn.

The hip-hop superstar stunned passengers in October when he jumped on a train and rode the rails to the Barclays Center Arena ahead of a massive show at the venue.

Footage of Jay-Z's adventure shows him sitting down in a subway car next to an elderly woman, who strikes up a conversation with the rapper even though she has no idea who he is.