Cool vid. I notice you lean your head alot in the corners..bad habit, or weak neck? (the passenger beside you was not)
Also...not sure if this has been answered, but what gear did you make the recording with? GoPro?
Must just be a bad habit

That's one of the reasons I mounted the camera so I could see the steering wheel and see what I was doing, which I don't notice while doing it.
I think a lot of it is my crappy stock seats with little lateral support, I have to lean and brace instead of just letting the seat hold me in. That and I'm too tall with a helmet and hit my head sitting straight. Hopefully that will be solved next season, I just picked up a pair of Sparco Torino 2 seats.
As mentioned, the gear is simply a Pentax W60, handy little camera. A friend got a GoPro but can't keep batteries in it, decent video though.