Clemson coach Brad Brownell wasn’t sure what he was watching in the first half as the 19th-ranked Tigers looked destined for another quick fall from the national rankings.Then Aamir Simms hit a go-ahead basket for a second straight game and Clemson rallied from nine-points down in the second half to beat North Carolina State 74-70 in overtime Tuesday night.”Thankfully, our guys woke up,” Brownell said,