First, Vegeta holds his hand forward up at a 90 degree angle like the normal Big Bang Attack, but charges it with more power. Then, he shouts "Try on my move, Super Big Bang Attack!" and fires the attack at the opponent, inflicting a huge amount of damage.
Video game appearances
The Super Big Bang Attack appears as one of Vegeta's attacks in Dragon Ball Z: Supersonic Warriors. He has this as one of his ultimate moves in Dragon Ball Z: Burst Limit, the other being the Final Flash. Vegeta uses a similar Super Big Bang Attack in as part of the team attack Garlic Buster that he performs along with Future Trunks in Dragon Ball Z: Supersonic Warriors 2.