The problem is that the "5 speeder" has a lot more grip at the rear. On a low-grip surface it is possible to achieve throttle-induced oversteer but in most circumstances will merely increase the understeer.
Tiff nearly rolled because when he came back onto the circuit from the grass, the rear tyre and one front tyre suddenly gave a lot more grip. There is no likelihood whatever that Tiff did that on purpose!
Obviously I bow to the knowledge of five speeder owners, but you are not looking to break traction, just alter the balance. A circuit, rather than the road is ideal to find out what occurs, and what can be done.
I totally agree Tiff didn't foresee the outcome, but I'd not lend him a car. While he is skilled at being spectacular, he's hard on machinery.
