The action ramps up as the alliance charges toward the palace.
Combatants like Chinjao, Cavendish, and Elizabello II set aside their grudges against Luffy to help him defeat Doflamingo as repayment to Usopp. One Piece Episode 684-685 Full Reaction.mp4 - Google Drive
The episode ends with the reveal of Pica's high-pitched soprano voice, which causes the characters (and reactors) to burst into uncontrollable laughter. Episode 685: Steady Progress! Luffy's Army vs. Pica! The action ramps up as the alliance charges
Episodes 684 and 685 of One Piece cover a chaotic turning point in the Dressrosa Arc where Luffy’s unexpected army of former Colosseum fighters forms and the battle against the titan Pica begins. Episode 684: Gathering into a Powerful Front! Episode 685: Steady Progress
A major reaction point is Zoro blocking Pica's attack before Luffy even speaks, reaffirming his role as the "Vice Captain".