IIRC the fancy brake and throttle "dance" is a form of manual "traction control." Obviously, the clutch is used when shifting gears. Way cool. I could never master this technique and hope I never need it. Now of days, of course, modern cars often come with very sophisticated computer technology which applies just the right amount of braking only to one wheel (or as otherwise needed) to give "automatic traction control." YMMV
Whadja think of all the folks hanging by the road? Guess that's to soften the collision if he slips off at some point.