Manchester United surrendered a two-goal advantage in a shambolic 3-2 Carabao Cup collapse to Brighton & Hove Albion as loud boos rang around Old Trafford and pressure on boss Michael Carrick went up a notch.
The result marked the first time in the Premier League era (1992-93) that Man United lost a home game in which it led by two goals in all competitions -- and the first time in 50 years going back to a 3-2 loss to Tottenham in 1976.
The Red Devils returned to Old Trafford three days on from a defeat to 10-man rivals Manchester City that was as painful as it was controversial, but this time they only had themselves to blame.
United had made a dream start to Wednesday's tie as academy product Shea Lacey kissed the badge having marked his first start with a goal a day after it emerged that 15-year-old talent JJ Gabriel had requested to leave.
Mason Mount added a second in the 10th minute, but Brighton were invited on and deservedly pulled one back through Charalambos Kostoulas just before halftime.
Carrick's men had no answer to the Seagulls' second-half surge, with Pascal Gross coolly levelling before substitute Maxim De Cuyper struck to spark the boos.
Fan fury was even louder at the final whistle as United found a new way to make an embarrassing Carabao Cup exit after last year's Grimsby humiliation.
The result leaves Carrick facing difficult questions, especially having wasted such a wonderful start.
Information from PA was used in this recap.