SOUTH NORWALK — Boomer DeMorro and the Lyman Hall/Haddam-Killingworth ice hockey team had something of a roller coaster night Wednesday at the SoNo Ice House.They fell behind host McMahon/Norwalk 3-1 by the end of the second period. DeMorro, one of LH-HK’s top players, had come off the ice with an injury.Happily for he and the Trojans, the night ended on an upswing they can ride into the CIAC playoffs.LH-HK rallied with three straight goals in the third period to take a 4-3 lead, gave up a tying goal with 1:40 to play in regulation, but rebounded to win 5-4 when DeMorro converted a feed from Rocko Cuccaro 5:51 into overtime.The victory put LH-HK at 8-10 overall and that puts the second-year co-op team in the CIAC Division III tournament.DeMorro finished with two goals. Cuccaro and C.J. Tangredi each had one goal and two assists.Kyle Stoddard set up two goals, including the game-tying goal by Nick Baccaro midway through the third period. One minute later, Cuccaro netted the goal that put LH-HK up 4-3. He was assisted by Tangredi and Manny Castro.Zach O’Toole had 21 saves in the Trojans’ net.