On Wednesday a YoutTube user Roger Triantafilo posted a video that shows Triantafilos son in the driveway on a bike when a dog grabs the child by the leg and pulls him off the bicycle. Out of no where Rogers cat charges and jumps at the dog forcing the dog to run away. His cat defends his son during a vicious dog attack and chased the dog off before he can do any additional damage. WARNING: THE VIDEO IS GRAPHIC AND SHOWS THE CHILDS WOUND. VIEWER DISCRETION ADVISED.