The Houston Cougars breathed a sigh of relief, celebrating their latest Sweet 16 berth.What looked like a victory in hand turned into an overtime thriller in the span of two minutes.Video above: How an arena prepares to host NCAA Tournament Emanuel Sharp started overtime with a 3-pointer that put Houston ahead to stay as the top-seeded Cougars advanced to the Sweet 16 back in Texas by topping No. 9 seed Texas A&M 100-95 on Sunday night.Houston coach Kelvin Sampson credited playing this debut season in the Big 12, filled with lots of close games, with having his Cougars ready for this game.“We’re very fortunate tonight to win. Texas A&M could’ve won that game,” Sampson said. “But only one team can advance. I’ve learned not to autopsy wins at this time of the year. So we move on.”The Aggies forced overtime with a furious rally, outscoring Houston 17-5 in the final …