ORLANDO, Fla. - A Tampa man is suing Jimmy Buffett's Margaritaville restaurant after the tip of a hypodermic needle allegedly lodged in the roof of his mouth as he ate a chicken sandwich.Ralph Walker said he's suffered recurring violent nightmares since the May 12, 2001 incident, resulting in the postponement of his marriage and emotional troubles for his 6-year-old son. He was visiting the restaurant at Universal Studios Orlando CityWalk with his fiancee and young son."Sometimes it's not real fun around here," said Walker, who works as a truck driver.The lawsuit, filed in Orange County, asks for damages in excess...