I used to ride my motor bike pretty quick. Once because of circumstances I had to pick my bike up with out my helmet and returning home I thought the police coming down the highway had spotted me. I fanged it and before I realised it I was doing 260 kmp/h with no helmet. I got home and realised they hadn't even turned around. LOL
One thing I do know is it is all about focus. If you are not focused you are dangerous at 10 kmp/h just like many old people who don't have focus because of reduced faculties.
The mind speeds up and adrenaline helps the body react quicker. Many people not under the influence of drugs are more alert and use more focus at high speed just like F1 or GP Bike racing.
