Throwing Caution to the Wind

The blond twin is a danger to herself. She is constantly in danger of hurting herself because she's not paying attention. She's either walking into something or tripping on something or dropping something on her feet because her mind is one place and her body is another.
Last night we were making whipped cream when I let the girls taste it in the bowl. The brunette twin stuck her finger on the side of the bowl and swiped some whipping cream. The blond twin stuck her finger in the middle of the moving mixer blades. As her finger headed towards the moving blades, I quickly said her name a couple of times. When that didn't work, I hit her on top of her head just as her finger touched the moving blades.  She jumped back, put her hand on her head and said, "Why did you hit me?" I put her on the couch on time out until I calmed down. She had no idea that she was so close to harming herself.  She didn't put her fingers in the blades, so they didn't get caught in the moving blades, but she was really, really close.
The girl just frightens me with her lack of focus. Most of the time she hurts herself and she doesn't even realize it. I looked at her arm last week and asked why she had a bruise on her forearm. She said, "I don't know. I think I hurt it getting out of bed." I didn't pursue it. I realize she doesn't really know. She's just coming up with something so I stop asking.
I try to think of her lack of focus as a cute personality quirk, but I can't. One day she'll be driving and it frightens me. The good news is she'll probably spend most of her time behind the wheel with her twin in the passenger seat. This is where the brunette twin's cautious nature will come in handy.
Until then we'll need to be on guard to keep the blond twin safe, even if it does mean a head swat once in a while to keep her finger out of moving mixer blades.