Aspinall was taking on Andrew Gilding at Ally Pally, and raced into a 3-0 set lead.
The Asp’ then continued his fine fettle in the fourth and final set by going 2-1 up in legs, with just 501 needed in a decider to secure his place in the round of 16.
But before stepping to the oche, Aspinall decided to halt the match and watch a fan down four pints of beer in the stands.
The fans chanted behind him as the spectator necked the jug, and the British star watched on with a wry smile.
Aspinall, who appeared to lose concentration, glanced in the fan’s direction during his penultimate visit as boos rang around Ally Pally, suggesting the spectator had been kicked out by security.
