Live coverage from where it happened jeff joins us live from San Francisco General Hospital and was critically injured being treated. Pam just been at the scene of the crash tonight with the latest. Reporter right now people starting to arrive at posts in stock in union square after less perfect tubifex that was the man right now as he concedes one of the worst of it we believe this is a pre as you can even make up the car thats been crushed in this accident San Francisco police so the Fire Department are still here right now and continuing the investigation to figure out why this started the speed down and then plug into bicyclist crash, and the cars and also the construction scaffolding. The glut of the video here firefighters trying to rescue people we of 20 people were hurt many are still in Critical Condition. This happened around 3 00 this afternoon when a tour bus lost control several blocks down the post street had a bicyclist and colliding with cars and. Taking down the scaffo