Yeah but, yeah but, did anyone hear about that copper over here in the UK who was charged with speeding at 159mph (254kmh) in a 70mph (112kmh) area, and over 120mph (192kmh) in a 60mph (100kmh) area.....evidence used was his own in-car video. He was not in pursuit of anyone and had no flashing lights. But he got off anyway after explaining to the court that he was testing the capability of his new traffic car.
http://www.4rfv.co.uk/nationalnews.asp?id=40691
It's a good road though, on which you can see for miles ahead, and I once "tested" an RX7 on the same stretch while delivering it to the bloke who bought it off me. I didn't intend to but some big Beamer with 2 suits in it kept stoking me on. Before I knew it, I just thought "oh bollocks" to myself and floored it. I couldn't see the speed on the speedo as the steering wheel was in the way, but the rev counter said almost 7000rpm, in 5th, and ever-so slightly going downhill.