Lila is absolutely gorgeous.
Ozzy knocks his head all the time, but in fits of rage. If you take something out of his hand? OH. MY. GOD. He will hurl himself down and BASH HIS FACE REPEATEDLY INTO THE FLOOR.
When Em went through those year-mark tantrums, I would usually just kind of hands-off it... sit beside her, talk to her, and only hug when she was ready to be touched again. With him, no way-- I have to sit there putting my hand between his face and the floor to keep him from hurting himself. And he'll be moving around trying to avoid my hand so that he can bash his face in the floor, I swear to god. He gave himself a bloody lip once when I was too slow. I'm way way way ready for this phase to be over.
Ellie likes to tantrum like Ozzy! She'll sit down and hit her head on the floor repeatedly, OR throw herself backwards. (Apparently I used to do the throwing-self-backwards thing when I was a toddler too...) Now I try to circumvent head damage by laying her down on the floor when I think she's going to tantrum--sometimes it works, sometimes it doesn't. No bloody lips (yet) fortunately!
She's also into everything...and the more likely something is to maim, damage, or kill her, the more interested she is in it. She's now really into running and climbing, and holy hell is she fast!
No words yet, though. Our pediatrician said 18 months was when she'd start to get concerned about language delays, but I can't help but feel worried sometimes (especially when I read that some of your LOs have 30 or so words already--wow!)