To perform this technique, Tien Shinhan swings his arms so fast they appear to be windmills on his shoulder and pummels his opponent uncountable times.
Machine Gun Punch was named in the Daizenshuu.
Appearances in games
It is named Dragon's Breath (顎龍拳, Gakuryuken) in Dragon Ball Z: Ultimate Battle 22 and Jackhammer Fist (マシンガン拳) in the Budokai series (the "Machinegun Fist" name being used for Tien's High Speed Rush).
It appears in the Budokai Tenkaichi series as Tien's and Mercenary Tao's grapple throws. Mercenary Tao also uses it as part of his Crane Style Assassin Strike. It returns as Tien's grapple throw in the Raging Blast series.