It was not just Boom Boom Afridi, it was a BANG !!!
For me, the moment of the match was when Afridi blew a kiss to Jacques Kallis after smashing his three consecutive deliveries to the boundary. When you are this confident, chances are, you are feeling good and you will do well and he did v. v. well.
Looks like Boom Boom is not only capable of a bang, he can blow a kiss or two :), after all, it is all about spreading the love and good cheer.