West Brom 2 Manchester City 1:Roman Bednar's injury-time header earned bottom side West Brom their first win in 11 games and increased the pressure on Manchester City boss Mark Hughes.
Luke Moore's first goal for the Baggies had given them the lead before City levelled six minutes from time, Scott Carson credited with an own goal after substitute Felipe Caicedo's backheel had struck a defender, the post and the goalkeeper before crossing the line.
But Bednar had the final say by heading home a right-wing centre from Gianni Zuiverloon to cause wild scenes of celebration.
Albion still prop up the table going into the Christmas period and will have to repeat their 'Great Escape' act of four years ago to survive.
Although his side has now gone six games without a win in all competitions, Hughes says he has been given assurances by club owner Sheikh Mansour and chairman Khaldoon Al Mubarak that he will be at the helm to embark on a January spending spree in the transfer market.
Hughes said: "There has been speculation about my future since the new owners came in, so it is not something that is new to me.
"Am I confident I will be given the money myself to spend? That is the intention. That is my view and I've had assurances from Sheikh Mansour and the chairman.
"They have been very positive. They understand where we are in our development stage. They are pragmatic people. They understand things will not happen overnight. Some people expect it to but they understand that won't happen.
"Time is something we all need — myself included — but I know the quality of my staff and we will gain results in the future.
"At the moment we are hurting somewhat because we are in the bottom three of the Premier League which is not something we anticipated."