As for collisions, well, Charlie was a mega-sweet machine, but he ran on eight hundred and seventy-five million lines of code. Good code, solid, well-tested code, spewed through distributed parallel processors far swifter and more accurate than the nervous system of any human driver. But code was still code, and code could crash. If the code crashed when Charlie was number-crunching high-speed all-terrain pursuit, then crashing Charlie would be the same as crashing any precybernetic car: fast hard stupid metal versus soft wet human flesh.