Bojack flies toward the opponent as he charges a Grand Smasher in his hand. He then shouts "Take this!" as he places the Grand Smasher over the opponent's chest and causes it to explode, blasting the opponent away and inflicting a great deal of damage.
In Dragon Ball Z: Bojack Unbound, Bojack uses this attack to defeat Super Saiyan Second Grade Future Trunks. As Future Trunks battles Zangya, Bujin uses his energy needles to restrain Future Trunks, allowing Zangya to freely attack him. After she finishes her assault, Bojack appears behind Future Trunks and blasts him to the ground with the Galactic Blow, reverting him to his normal state and rendering him unconscious.
Video Game Appearances
In Dragon Ball Xenoverse 2, as part of the Super Pack 3 DLC, it appears as Bojack's grab throw. In Xenoverse 2, he uses rapid movement to get behind the opponent, before attacking them with Galactic Blow.