TALLAHASSEE, Fla. -- It will be a while before Florida State fans forget Harrison Barnes.

The 18-year-old North Carolina freshman coolly hit a 3-pointer from the top of the key with 3 seconds to play that gave the 13th-ranked Tar Heels a 72-70 victory and silenced a boisterous Seminole crowd.

"Great players make great plays," Florida State coach Leonard Hamilton shrugged. "That's about as good as it gets."

But it wasn't anything unusual for Barnes, who has made the game-winning or go-ahead shot in five games this season.

"I've always been comfortable taking the last-second shot," said the soft-spoken Barnes, who is from Ames, Iowa. "I'm glad Coach gave me the opportunity and I came through."

Barnes was supposed to drive to the basket, but decided to pull the trigger from long range after he briefly surveyed the defense.

"They had three guys high so I knew it was going to be a jump shot, because it would be hard to get to the rack," he said.

"You can't really second-guess yourself," Barnes said. "You have to go with the first instinct."

Florida State's Michael Snaer blamed himself for letting Barnes get a solid look.

"I just gave him too much breathing room," Snaer said.