Re: specialty clutching. heel toe? double clutch? (scrumshy)
Heel toe driving, at least to my understanding, is when you operate both the brake and gas with the same foot. So as you slow down, you blip the throttle, to bring the engine's RPMS up high enough to match the speed of the transmission when downshifting. It's to avoid the "jerk" you feel when you let the clutch out while downshifting. During extreme cornering, that little "jerK" when the clutch is let out can be enough to make you lose traction. It also makes the shift smoother, and saves some wear on the synchromesh.
Double-clutching is part of the procedure. Say you're in 4th gear doing... ehh, 80, and you're coming up on a hard corner that you can take at 60... You depress the clutch, let it out about halfway or so in Netural, blip the throttle, push the clutch in, and set it to 3rd. This again matches the speed so the shift is smoother. You can do it while upshifting as well, except you don't blip the throttle, as in this case, you're trying to slow down things, as you're going into a higher gear. So you'd just go 3, clutch in, N clutch out, clutchin in, 4th, clutch out....
I tell you, it's 32470673457892347 times easier to explain in person or by demonstration...