a san francisco police car hits tim doyle as he rides to work on mission on bike day. a cell phone captures the collision that launched the 48-year-old into the air. >> you're going like this, and all of a sudden you see this thing and it's just you know it's coming. and luckily, somehow i fell, i had my helmet on, i think i landed on my back. >> reporter: the cyclist has a fra fractured bone in his back, and a pin in his leg. >> they didn't do it on purpose, they definitely made a mistake. but it's just like whoa, where did that come from? they did not see me for sure. >> reporter: the officer stopped to help and called for an ambulance, the sfpd installed the bike lane in march. the san francisco bike coalition says the collision is not the first on second street and the city needs to act faster. >> really, there is no excuse for the city not acting with urgency to prevent another crash like this from happening. >> reporter: doyle will be laid up for days, he said, and will need a new bike, and hopes the san francisco police officers will slow down. >> they should be