Nerf brought out the big guns this year. Part of the Rival line for older kids (and adults) the Prometheus MXVIII-20K is a hip-held, fully automatic cannon with a chainsaw grip that unleashes a ridiculous eight shots per second at speeds up to 70 mph. Instead of darts, the Prometheus, which is powered by a rechargeable battery, weighs five pounds and has a safety to ensure nobody accidentally shoots out the dog’s eye, fires 200 dimpled foam rubber balls. Is it over the top? Sure. Is it awesome? Absolutely.