Gym-goers clock each other with exercise equipment in wild brawl

British dumbbells used workout equipment to attack each other during a terrifying caught-on-camera gym brawl. The wild footage shows one workout warrior screaming obscenities as he swings around the metal bar from a pull-down machine -- smashing it against a counter that another gym-goer had just leaped over. As other gym-goers abandoned their workouts to...