Bournemouth reached the last eight of the League Cup for the first time as Callum Wilson's late strike knocked out West Bromwich Albion.
The home side, who merited victory, led when Junior Stanislas fed Eunan O'Kane to drill his first of the season.
Wilson ran clear to finish right footed immediately after West Brom levelled through a Tommy Elphick own goal.
Chris Baird and Youssouf Mulumbu headed over late on but the Championship club are now two games from Wembley.
It is a sign of a remarkable transformation for a side who, six years ago, started the League Two season with a 17-point deduction for exiting administration in an incorrect manner, but now sit fourth in the second tier and are enjoying their best League Cup run.
Their meeting with West Brom was their first appearance in the last 16 for 51 years, but manager Eddie Howe said cup matches were "free games" ahead of kick-off, with his focus on their league campaign.
His relaxed nature was visible in his players, who though sometimes lacking cutting edge, attacked with the freedom of a side who have scored 12 goals without reply in their last three league outings.