I only remembered the second time I saw that expression a few hours after it happened.
To be fair, I had some other stuff goin' on. Like, I don't know, trying to stop the bleeding from my face, or keeping myself from squealing in a very unmanly way as the emergency room doctor reset my broken nose. A few hours later, when I was a bit woozy on painkillers and Ducky's prescription of scotch, I went over the events of that day (and the night).
I remembered the concern and worry in her voice when I told her my plan. I could see part of her face, and I interpreted it as fear. 'Like she'd show fear,' I'd joked to myself. When I thought about it later, though, in the safety of my apartment, I realized that she had been afraid. For me.