Facing away from his opponent, Fugo claims that he's made a decision worth betting everything on, before he turns around and reveals a Capsule between his teeth. He forcefully bites down to crush the Capsule and blows the Homicidal Virus cloud forward.
If they are hit, the opponent will cover their face and scream in agony as they begin rapidly melting from the Virus; A camera shot of their skin breaking down and dissolving is shown. Purple Haze Distortion, releasing all of its rage, begins to violently beat them, spreading the Virus into their system even more. The Stand finishes the attack by unleashing a spinning punch that sends the opponent flying as they're completely eradicated.
If Purple Haze has not already evolved into Purple Haze Distortion, executing this GHA will automatically do so, regardless if the attack successfully connects or not. This GHA also completely reloads Fugo's Capsules.
Of note is that Fugo's use of a Capsule between his teeth to unleash the viral attack references his first demonstration of Distortion's power during his final battle against Massimo Volpe in Purple Haze Feedback, while Distortion's violent follow-up assault is in reference to the battle with Illuso at the same time.
Along with Funny Valentine's GHA, Fugo's is the only special move to alter the contrast of the screen (resulting in a more black and white combination of colors to add more intensity to the special, and obscure the sight of his opponent dissolving).