My younger sister would throw bottles,bite people who came to close etc,she can still be unexpectedly violent today (she's in her twenties now)When I was young, me and my brother were scared of the baby, he was was............... "Aggressive". He could throw snow globes at a rate you wouldn't believe for a small child. I will admit that me and my other brother weren't completely innocent always, but each of us all instigated a scuffle with the other sometimes.