After colliding with an elusive 16-X Muni bus on Upper Great Highway, a cyclist is in critical condition this morning. The crash happened at around 6:30 p.m. According to reports, the bicyclist was allegedly not wearing a helmet, heading "eastbound on Noriega Street from Upper Great Highway to Lower Great Highway" when the bike clipped the bus traveling in the same direction. The unidentified victim is at the hospital being treated for life-threatening injuries. Also, this most recent accident occurred after a cyclist was hit on Townsend Street, and another was injured on Fillmore and Fulton. UPDATE: According to the Taraval police station crime report's "6:33 p.m.; Noriega and Great Highway, Muni Bus Hits Cyclist/cyclist dead at scene.