when you just side your foot off the side of the pedal and let the clutch fly up.
a good tip if you want to race off the lights is to dring the clutch just up to the bite at the lights rather than all the way to the floor. that way theer is some torque being applyed to the box so all the lash in the gears is taken up before you present loads of power to them. makes gearboxes last longer.
shock loadings are good at killing friction disks, pressureplates, gears and diffs in all cars
