My Boss's Targa car launches at 7500 rpm. Twin plate clutch, 330+ rwkw.
Has Motec, so it's s simple procedure.....
Engage clutch, select first, plant right foot, when it sounds like there is gunfire behind you, disengage clutch as quickly as you can.
1.5 seconds later flat change into 2nd (gotta love flat shift control)
1.5 seconds later flat change into 3rd.
Grin like idiot, giggle like school girl.
Stop. Repeat.