ARossmoor resident suffered bruises, scrapes, torn clothes and damage to his bicycle when a hit-and-run motorist knocked him off his bike at the intersection of Rossmoor Parkway and Tice Valley Boulevard on Jan. 6, about 11:35 a.m. “I was really shaken,” said Leif Nielsen, 71. “I’ve been having headaches, so I think I might have a concussion. It’s going to take a long time to get back