Orange Town Arc
Who Will Win? Showdown Between the True Powers of the Devil! - 勝者はどっち？悪魔の実の能力対決！ (Shousha wa Dotchi? Akuma no Mi no Nouryoku Taiketsu!)
Buggy has a history with Luffy's friend Shanks. The two once even served together on a ship. What was it that caused such hatred for for Shanks?
"We Are" by Hiroshi Kitadani
"memories" by Maki Otsuki
Though having a Devil Fruit power makes Buggy far stronger then he used to be. It makes it impossible to find the treasure he wants.
This is another one of the rare times a Devil Fruit is actually seen before it's eaten. It's surprising that Buggy would be allowed to eat something worth over a billion beli.
Buggy's anger is greatly misdirected at Shanks.
What happens to Buggy after he is sent flying is explained in the manga splash pages, and there is even a special filler episode of the anmie that shows this story.
The sheaths to swords swords aren't with him.
It's much later revealed that Shanks and Buggy were a member of Gold Roger's pirate crew. It's also explained much, much later that in order for the rest of Buggy's body to levitate his feet need to remain planted.