Lol, thats pretty funny .
But if you are serious the whole point of a haymaker is that there is no technique just swing your arm as hard as possible and hope for the best. Unless the guy you are boxing knows less about boxing than you though its probbably not the best way to go. In fact even if the guy knows less than you I still wouldnt go that route. Its the equivalent of asking a soccer player how to do a 'toe bunger'