The same crowd that roared at the start of the series was stunned, with their beloved Hurricanes shut out through the first two periods for the first time since mid-January. They were fewer than 15 minutes away from a 2-0 hole that only five of 55 teams have overcome to hoist the Cup. The topsy-turvy ride that followed ended with Carolina winning in emotional fashion and making this a competitive series between two of the best teams in the NHL. Game 3 is Saturday night in Las Vegas. If it is anything like the first two, it is best to expect the unexpected the rest of the way. “It’s obviously a new series, a five-game series now,” said defenseman Shayne Gostisbehere, who leads the Hurricanes with three points so far in the final. “A lot of emotions throughout the games, too. For almost 50 minutes there it’s kind of low, and then kind of even, then really high, then low again, and then high. It’s a roller coaster for sure.” This final is shaping up …