Gary Neville was left fuming during Manchester United's humiliating defeat to Liverpool and Jamie Carragher took full advantage.
Erik ten Hag's side fell to a a heavy 7-0 defeat at Anfield, conceding six goals in a hugely disappointing second-half.
And Carragher was all smiles after the fifth goal as he took a photo with an angry Gary Neville while on commentary duty for Sky Sports.
The former Liverpool defender also took a jibe at Neville after Firmino scored the seventh goal two minutes from normal time.
Carragher stated: 'Bobby Firmino Si Senor! That was the perfect thing toay, culd Bobby Firmino come off the bench after the news.
'To beat Manchester United 7-0. Fantastic. You think the chance is gone. That man is a bonafide Liverpool legend, and that is the icing on the cake.'
Neville replied: 'You do not get beaten 7-0 at anfield if you're a Manchester united player,' before carragher simple said: 'You do today'.
Neville reacted furiously again by telling Carragher to 'do one'.
January signing Gakpo opened the scoring with a curling effort from the edge of the box two minutes before the break.
Darwin Nunez finished off a pouncing Liverpool attack by steering Harvey Elliott's cross past United shot-stopper David de Gea two minutes into the second-half.
Gakpo bagged his second goal just minutes later before Mohamed Salah got in on the action as well.
Nunez then scored his second goal of the game with another well-taken header in the 75th minute before Firmino came off the bench to secure a 7-0 Anfield victory for the hosts.