>> gavin mcginness posted this video titled how to fight a baby. >> 13 million people have watched thisot that funny. >> it must have struck a chord. when they see people whipping their kid around they go that's what i do. children benefit from roughhousing. you are physically bonding with your child. and i can see them benefit from this. >> when you tell them to be scared and don't roughhouse and stand back and don't touch, you create an environment of fear. >> i don't find this funny. >> some experts were quick to call gavin a bad parent. >> shaken bean syndrome happens exactly like this. >> gavin put his hands around the baby's neck. >> just because something can arguably lead to something serious doesn't mean we have to avoid it. living that kind of life where you say achoid this and avoid that, you are teaching a child to be scared of the universe. >> a kid broke his leg in a tree, people demanded the trees be cut down. >> what is wrong with a broken leg? it's six weeks. >> my heart swells with pride that my kid has a cast on. >> we are kids we want to protect them. >> that's true