West Brom came from behind to inflict a fourth straight Premier League defeat on struggling Bournemouth in a captivating game at The Hawthorns.
Joshua King's calm penalty put the visitors ahead on five minutes after Nyom had clumsily wrestled Ryan Fraser to the ground inside the area.
Craig Dawson equalised at the end of a thrilling first 10 minutes as his strike took a big deflection off Charlie Daniels as Artur Boruc dived in vain.
Boruc's woeful error in failing to punch clear a corner allowed Gareth McAuely to put his side in front on 22 minutes, with the Cherries' recent defensive woes routinely exploited by the hosts at set-pieces.