all-out attack
From the Persona series starting with Persona 3, a battle mechanic where when all enemies are in "Downed" status, the player is given an option for an "All-Out-Attack", triggering a graphic-cut in and a dust-clouded beat-up animation for high damage.
The sequence is often parodied by both Persona series and non-series alike. It is characterized by split facial profiles, along with often two red exclamation points, "!!".
Persona 4 parody iterations are subtly different from Persona 3 iterations. In Persona 4 parodies the characters sport glasses, whereas Persona 3 does not. Backgrounds are typically checker-patterned, and vary in color.
Persona 5 parodies are a significant departure from the 3 and 4 variants. Rather than the split-screen, character portraits are instead rendered on the debris from a shattered-screen effect. More commonly parodied from Persona 5 is the finishing screens that show up when the All-Out Attack finishes the fight, featuring the character that initiated the attack striking a pose while a personalized message appears on screen in a style specific to that character. Persona 3 Reload adds a similar finishing screen, albeit with a more restrained aesthetic compared to their P5 predecessors. Persona 4 Revival changes up the finishing screens, with the character who initiated the AOA shown front and center ahead of the rest of the party, while the background features video walls showing various graphics of the character.
Please only use this tag for multiple characters in a picture, not for single expressions of !.

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