West Bromwich Albion were beaten for only the second time in the Championship this season as Joel Piroe and Jamie Paterson gave Swansea City a thrilling comeback win.
Karlan Grant's fifth goal in as many games put Valerien Ismael's side in front inside the first minute.
Piroe coolly levelled before Paterson, the hero of the south Wales derby, scored another fine individual goal.
Improving Swansea climb to 15th, while Albion drop to third.
Boss Russell Martin could take huge satisfaction from another progressive Swansea performance, particularly after such a disastrous start.
His team are celebrating back-to-back league wins for the first time this season, while West Brom have lost two in three, having gone unbeaten in the league until defeat at Stoke earlier this month.