There is a child I nanny for who acts so well behaved with me but it seems as soon as his parents come home he starts to act out. Today he threw fruit at me without any warning and when I didn't catch it he thought it was funny. He also begins to curse like a sailer whenever they are around. This child is 11 years old. He's bigger then his mother and sometimes I am worried that his impulsive actions with his parents may seriously hurt them. I don't know how to help this family with their child. I hope that as soon as I leave he starts to behave appropriately again.