In Super Smash Bros brawl how do you do the home run challenge?

To basically do this, you should first pick a strong,heavy character(Bowser,ganondorf,captain falcon etc) then attack the bag.In the last five seconds pick up the bat,charge it by holding sideways button and attack at same time,then release for a high score.

put some good damage on the sandbag and at the last second start the supercharge bat(no glass to break)