Erik Karlsson scored 5:23 into overtime after the officials missed a hand pass by Timo Meier, and the Sharks rallied to beat the St. Louis Blues 5-4 on Wednesday night to take a 2-1 lead in the Western Conference final.
But it was the final sequence that likely will live on long after the series is over, possibly sparking a discussion about the NHL's replay rules.
Meier used his right hand to knock a loose puck toward the front of the net. Gustav Nyquist then passed it over to Karlsson, who beat Jordan Binnington for his second goal of the game.
Binnington and the Blues complained immediately. They felt the play should have been blown dead when Nyquist got the puck, but it continued.
The officials huddled while Karlsson and the Sharks celebrated, but the goal stood.
The Blues led 4-3 before Logan Couture tied it with 61 seconds left in regulation. Joe Thornton scored twice for San Jose, and Martin Jones made 28 saves.
Perron had two goals for St. Louis, and Vladimir Tarasenko and Alexander Steen also scored. Colton Parayko had three assists, and Binnington made 27 stops.
The Blues trailed 2-0 after one and 3-1 in the second before rallying.
Tarasenko, who faced criticism after a lackluster performance in Game 1, started the comeback with his first goal in six games at 4:05 of the second. Perron tied it by beating Jones on the stick side with a wrist shot from the left dot with 3:57 left.
St. Louis went on a power play after Brent Burns took down Oskar Sundqvist late in the period. Perron scored his second goal of the series a minute later, giving the Blues the lead with their first power-play goal in 19 chances with the man advantage.
It was Perron's first multigoal playoff performance in 73 games.
Game 4 of the best-of-seven series is Friday night in St. Louis.