Megaton Throw (メガトンスルー) is a grapple throw used by Nappa in the Budokai video game series. Nappa grabs the opponent and yells "Gotcha!" Then he jumps into the air and plummets back down, spinning the opponent in midair. When he lands, the opponent hits the ground headfirst, causing serious damage. A similar version of this attack appears in Dragon Ball Z: Taiketsu, in which Nappa grabs the opponent and slams them headfirst into the nearest wall.
Techniques similar appear under different names and used by a few other characters in the Budokai games, such as the Dodoria Typhoon.