As all of you know, Luffy comes up with strange but, also powerful Gum Gum attack when he fights a strong opponent. So I willing to hear others ideas of what Gum Gum attack Luffy might come up with. Here's what I come up with.
GUM GUM JACKBOX- Luffy extends one of his legs up in the air. Next, he'll twist his leg like a spring. Then, he'll unleashes it and his leg will drill into the ground. Last, his leg would sprout from the ground where his opponent is staying and be kick very hard in the jaw senting the person flying straight up in the air.
The reason why I gave the attack this name is because it suppose to represent a jack in the box, which catch people off guard.
So come on guys/gals. Try it and have making up an attack.