I wonder what other people think when I'm writing. I just realized, as I was typing a paragraph, that I was mimicing my MC's actions, trying to find the right word to describe her movements. Thank goodness no one was here to watch.
I know I do this often. In the midst of writing, I'll make a face, shrug my shoulders, or pace the living room acting out a scene to gather the most detail I can.
I'd love to be a fly on the wall and watch myself write just to see how goofy I must look :)