ESTERO, Fla. — Carolina’s shooting was as cold as the hockey arena for most of Friday afternoon before shots finally fell and the No. 18 Tar Heels staged an amazing fourth-quarter comeback. The Tar Heels trailed by as many as 13 points but finished the game with a 20–6 run, taking the lead in the final two minutes on their way to a thrilling 54–51 victory over Vermont in the first round of the Gulf Coast Showcase at a chilly Hertz Arena.