Arsenal twice squandered the lead as they were dumped out of the EFL Cup by Liverpool on penalties after a remarkable 5-5 draw at Anfield.
Under-pressure Gunners boss Unai Emery needed a positive result to lift the gloom around Arsenal after they let slip a two-goal lead to draw 2-2 with Crystal Palace, but Jurgen Klopp's irrepressible young Reds prevailed.
Shkodran Mustafi's own goal and James Milner's penalty bookended a Lucas Torreira strike and Gabriel Martinelli's double in a first half characterised by defensive errors and gung-ho attacking.
Ainsley Maitland-Niles extended Arsenal's 3-2 interval lead before strikes from Alex Oxlade-Chamberlain and Divock Origi levelled the contest, only for Joe Willock to put Arsenal back in front with a wonderful solo effort 20 minutes from time.
But Origi penetrated Arsenal's porous defence again to take the game to penalties, and Dani Ceballos had his spot-kick saved as Liverpool clinched a place in the quarter-finals at the expense of their beleaguered visitors.