Substitute Carlos Vela rescued a point for West Brom with an injury-time equaliser in the Black Country derby with Wolves at the Hawthorns.
On loan Tottenham striker Jamie O'Hara's stunning strike looked to have settled the game in the first half.
But, with seconds remaining, Wolves keeper Wayne Hennessey spilled James Morrison's shot and Vela, who is on loan from Arsenal, converted the rebound.
Wolves had been the dominant force in the opening 45 minutes as they made the most of their numerical advantage in midfield.
O'Hara looked sharp and on his current form Wolves boss Mick McCarthy looks certain to take up the option to make the move from White Hart Lane permanent in the summer.
Matt Jarvis also caused problems down the left flank while Kevin Doyle was his usual threat as the lone striker.
It was a different story after the break as Wolves dropped deeper and Paul Scharner started to exert his influence in midfield.
O'Hara made a determined run at the Baggies defence inside the first 30 seconds before his eventual shot was blocked by Jonas Olsson.
A ball over the top of the Wolves back four from Gabriel Tamas almost played in top scorer Peter Odemwingie.
But Hennessey was alert to the danger and was able to clear from the edge of his area.
Matt Jarvis was causing problems down the left flank for Gonzalo Jara and another probing centre was headed over by O'Hara.
Hennessey was called upon to make the first save of the game after 21 minutes but he easily dealt with Olsson's header from Chris Brunt's corner.
West Brom started to gain a foothold in the game and Scharner's glancing header from a Nicky Shorey cross went just past the post.
Marc-Antoine Fortune should have done better when he headed a curling shot from Graham Dorrans over the bar from close range.
Then five minutes before half-time a stunning strike from O'Hara put Wolves ahead.
