DS came home and was GRUMPY, I started unpacking the groceries and I had a go about the fact that he is miserable (AGAIN) when he walks in the door. He walks out the kitchen, I have my back to the door, he walks back in and kicks me from behind!! Full force on my back. I have no idea how to handle this. I yelled but the kids were there ( :( ) He is now sitting on the pc like nothing happened :( This happened about 15 minutes ago. Please, please help.