Flaming Dodgeball

A flaming dodgeball is a big metal ball that blew fire.

The Sea of Monsters
In The Sea of Monsters, the Laistrygonian giants threw these at the Meriwether College Prep gym. Percy and Tyson had to dodge these as the "dodgeballs" were being thrown. Percy was unable to attack the Lastrygonian giants because he didn't have Riptide (his magical celestial bronze sword) with him at the time. Tyson on the other hand was a giant himself, so he was able to catch the flaming "dodgeballs" and throw them back at the Laistrygonian giants. Tyson was able to do so because of the one of his cyclops traits, immunity to fire.