Bosnian Ervin Zukanovic stole a point for Sampdoria with virtually the last kick of the match in a 1-1 draw at Lazio on Monday.
Earlier, substitute Alessandro Matri looked to have grabbed a match-winner for Lazio, who like Samp have now gone seven games without a win.
On-loan Matri struck 12 minutes from time, heading home Stefan Radu's cross after good work from Felipe Anderson in midfield.
But a crucial deviation from a free-kick off Felipe Anderson's head allowed Zukanovic to score three minutes into time added on at the end of the game.
Lazio, a group of whose fans dumped manure at the club's training centre on Friday in protest at their poor form, moved up one place to 12th with the point, while Samp remain 16th.
Matri's goal came only 12 minutes after the AC Milan loanee entered the fray to replace German Miroslav Klose.
It was a rare moment of quality in a match notable for the two sides' visible fear of losing that made for a dull and drab affair with few chances, particularly in the first period.
Sampdoria had a great chance to take the lead midway through the second half but Lazio goalkeeper Federico Marchetti denied Antonio Cassano one-on-one.
Just before Matri's goal, Samp had another clear chance but Luis Muriel's fierce strike from distance whistled just past the far post.