Damn dude.. that sucks.. I hope you are OK.
On avoiding getting clipped.. I remember when I was taking the Motorcycle Safety Foundation class the instructors keep telling us that if we have to crash it's better to do a low slide as opposite a high slide. I'm not sure if this can be applied to bikes. But I would image its a lot safer if you slide with the bike instead of flipping over the bars. I don't know how to make it happen tho.
Now that I'm thinking. Maybe its better to replace my front brake with rear brakes so I can do low slides.
When I'm riding my bicycle I feel like a Buddhist who is happy just to enjoy his mundane existence. ~ Robin Williams