I'm having a really hard time understanding this one. This is all on a fairly straight piece of highway too. Four motorcycles collide; five injured on Highway 1 Six riders traveling together on four motorcycles crashed into one another Sunday morning while heading north on Highway 1 near Pescadero Road. Five were flown to Stanford Medical Center, two with serious injuries, according to the California Highway Patrol. The 11:05 a.m. accident occurred after two of the motorcycles stopped behind a Toyota Tacoma, which was preparing to make a left turn onto Pescadero Road, said officer Ryan O'Day. The last two motorcycles failed to stop in time and slid into their traveling companions. George Boyson, 75, of Pacifica suffered a compound leg fracture, broken arm and head trauma, O'Day said. Boyson was riding the last motorcycle. Also badly hurt was the lead rider, Robert Bacich, 70, of San Francisco. He suffered rib fractures, collapsed lungs and a dislocated left shoulder. The road was closed for about two hours for emergency crews to render aid and for helicopters to land, O'Day said. All lanes of the highway reopened at 1:45 p.m. [URL]http://www.mercurynews.com/mld/mercurynews/news/local/13802979.htm[/URL]