Almost took out a deer at 60mph a few nights back. I was taught to brake, or swerve, not both. I practice sudden stopping at some back road intersections and am glad I had. When the deer ran out I swerved, he followed, then I braked. I locked up at least one of the tires for a second, but I think practice saves everybody time, money, pride, and livelihood. I think that, generally, "laying down a bike" is deferment of fault.