This film probably started, like many great works of art, with a conversation in the pub about the best crisps.

Monster Munch came in pretty high on everyone’s list, but then the question became: is Monster Munch technically a crisp? I suppose you have to define the parameters of the competition before engaging. These things matter.

Anyway, somewhere along the line, that became a commercial about a cardigan-wearing nan absolutely flattening someone for a packet of McCoy’s.

Who doesn’t want to dress their nan up as an American football player, right?