Thanks for the kind comments so far!
Vintage Racer, I'll upload a better fire shot without the page curl effect later.
Mole2k, thanks for your input!
Do you have any tips for manual focusing and "guessing" the right moment?
I tried prefocusing (although with AF) but the results weren't very good: DOF is about 40-50cm, and when you're low on the ground, there's hardly any reference for you to see, when the Buggy is about to enter the DOF.
The Nikons have a focus trap, Canon excluding the 1D series have not, which is really a shame
It could be very useful in shots where the car is coming towards you and the ground is to "flat" (perspectively spoken) to guess the distance.
The Canon focus trap means taping the last contact plate on the right of the lens when viewed from behind, but you loose any autofocus by doing this.