Item Bomb gives 10 users online an item, this doesnt include the user, it is random so everyone has an even chance to get an item. The user of an item bomb get 1500 + 1pp per how ever many people are online

Note: Some achievements give Enhanced Item Bombs. These give 30 items to 30 different people including the user. It is random so everyone has a chance. The user of an enhanced item bomb gets 5000 + twice the users online PP