When the sting hits his fist, his initial reaction causes him to bite down on his thumb harder. With the piercing teeth tearing into his digit, Luffy draws in a long breath of air to inflate the hand in which he bites. The clenched hand expands out like a balloon, growing large and stretching out from all sides as he continues to push air into the limb.

With a growl, the lighted arm begins to draw back at great speed. The flame keeps and burns his hand as it comes flying back towards him. In mid-flight, the air from his bitten hand shifts, causing his torso to grow large before cyphering into his now blazing punch.

"GIGANTO PISTOL!"

The screaming attack of flame and fury rockets towards the plant, covering enough size to not only slam into the vines but to the bulb as well. His punch was more like a wall, an anger-fueled bulldozer of flame that struck the exposed plant with the kiss of fire and the full rush of his called upon strength.