Konsta Helenius #94 of the Buffalo Sabres celebrates his first period goal against the Montreal Canadiens in Game Five of the Second Round of the 2026 Stanley Cup Playoffs at KeyBank Center on May 14, 2026 in Buffalo, New York. (Photo by Bill Wippert/NHLI via Getty Images)The Buffalo Sabres and Montreal Canadiens put on one of the craziest NHL match results of the postseason with a frantic opening period loaded with goals, deflections and momentum changes. Cole Caufield and Konsta Helenius were the focus of the wild game in Buffalo as both teams traded quick scoring chances.The first period saw the Sabres score three goals on just four shots, and that quickly became a major talking point in the NHL news roundup discussions. The fast-paced matchup also had people talking more about the Montreal Canadiens' defensive woes and the Buffalo Sabres' offensive depth going into the next playoff games.Konsta Helenius and Cole Caufield exchange momentum-changing goals during NHL playoffKonsta Helenius and Cole Caufield scored key momentum-changing goals in the first period to change the game.Buffalo Sabres Jason Zucker got credit for the first goal of the game on a lucky bounce off Phillip Danault and into the net. Montreal responded quickly, with Cole Caufield tying the game after exploiting a defensive hole of Buffalo. The equalizer gave the Canadiens a brief respite before the game exploded again.Moments later, Josh Doan restored Buffalo’s lead with a clean finish past Montreal Canadiens goalie Jakub Dobes. But the Canadiens responded seconds later when another odd bounce off Alex Texier's skate found the back of the net.Then, the biggest moment of the period was from Konsta Helenius. The young Buffalo Sabres forward corralled a loose puck in the slot and blasted his first NHL playoff goal past Dobes, giving Buffalo another lead and energizing the home crowd inside KeyBank Center.The Montreal Canadiens had issues with rebounds and deflections all period long. Jakub Dobes had to contend with traffic all around the crease, and Buffalo aggressively pursued every loose puck opportunity.The rapid-fire scoring pace immediately set off NHL updates and NHL game preview discussions across social media as fans reacted to the unpredictable first-period chaos. Both offenses were turning dangerous looks into dangerous opportunities at a steady clip, and now the matchup has serious momentum implications for the rest of the series.