"Bursting" is a WLO slang term for a way to get more experience by fighting monsters as a part of a party instead of simply soloing. You have to catch a pet, of which is usually represented by your level. The pets commonly used are: Pig, Sheep and Cow. You can burst anywhere, but most players prefer to burst in North Island against Jellyfish Monsters, or in South Island against Senior Beetles. You can burst after getting over level 180 or after being Reborn, but you don't get any experience. The order of moves the common pets use is: Defend, Defend, Defend, Normal Attack, Normal Attack,