Jake Livermore scored a dramatic 94th-minute winner as Albion claimed a last-gasp 3-2 triumph over QPR to record an eighth victory in their last nine away matches in the Sky Bet Championship.
Livermore pounced in injury-time to convert Mason Holgate's low cross from close range and seal all three points in thrilling style, sparking celebratory scenes in front of Albion's travelling faithful.
The winner capped a spell of late pressure from the visitors having twice been pegged back by the R's at Loftus Road.
Jefferson Montero, making his first start for the club, bagged his maiden goal after just five minutes, although Luke Freeman levelled for the hosts before the break.