Confetti and Mixtapes! The things this item sprays in the air (minus the mixtapes). Unfortunately, it doesn't stop the apocalypse in its tracks so you're better off with a Grenade.
Tips
The Halloween Bomb is occasionally able to fling zombies if dropped properly.
Other then that, it's pretty useless.
Trivia
The Halloween Bomb has a mesh similar of that used for Lord Pumpkin.
The Halloween Bomb is able to fling the user
The Halloween Bomb's Confetti is rarely able to glitch another players leg, causing them to sink into the baseplate if they step on the one stud of confetti. The glitch is "harmless" considering it only applies to that one stud
The Halloween Bomb is occasionally able to fling zombies if dropped properly