Underarm tactics

I know this has been done to death over the years, but while I've seen the ill-fated final delivery of the Australia vs NZ one-dayer at the MCG on 1 February 1981 and Brian McKechnie's disgusted flinging of his bat on TV before, I've never actually watched the whole over. This full Channel 9 clip has the delivery itself at 4:50 but the whole thing is worth watching, particularly for the unequivocal summary by Richie Benaud at the end.