A fluke goal one minute from time gave Lincoln a 1-0 home win over 10-man Swansea and their second success in three days.
The Imps looked to be heading for a goalless draw against the bottom club until substitute Paul Smith blasted a shot which cannoned off the post but struck defender Kris O'Leary on the knee and flew into the net.
Swansea had earlier created plenty of chances but could not finish them.
Striker Marc Richards was twice put through in the opening three minutes only to be defied each time by Lincoln goalkeeper Alan Marriott.
James Thomas wasted another two good chances but Swansea found themselves up against it after striker Jamie Wood had been sent off for a 42nd-minute challenge on Lincoln winger Chris Cornelly.
Lincoln tried to make their extra man count but substitute Simon Yeo was twice unlucky when he put first- time efforts wide and then hit the post with Roger Freestone beaten.
Swansea had a chance to equalise in stoppage time but Richards missed his kick from a great position.