You're fighting Luffy. Currently, you have the upper hand as it seems he's exhausted. You go for a sudden attack, and it passes him out. You thought you won, but suddenly Luffy started to awaken. His hair started to become similar like a cloud, his eyes becoming red. He started laughing and smiling.

"Woah, I feel so funny!" He laughed.

"I feel like can do everything I wanted to do! My heartbeat sound's so funny, This is the pinnacle of what I can do! This is.. Gear 5!"