The Prodrive anti-lag system works by keeping the little propellers (on the turbo) spinning and forcing lots of lovely oxygen into the engine even when there aren't enough exhaust fumes to turn them normally. And it does this by dumping petrol into the exhaust, just before the little propeller. As soon as the petrol touches the very hot exhaust pipe it explodes and this explosion keeps the propeller turning so when you step on the accelerator there's no irritating wait for it to for it to get spinning and instead you have an instant dollop of big fat power. Or something like that.
