This woman, a guest in our meeting, while clearly intelligent and on it, seems to me to be a little contemptuous of my company (though she's trying her best to hide it), and it's starting to get on my nerves. When people get attitudes, I tend to tune out, but I'm doing my best to give her the benefit of the doubt, go against my regular habit, and really pay attention.
So I'm staring right at her as she's speaking to the group, listening to her points and trying to take it all in, when she turns and looks directly at me.
"Would you please not do that?" she says sharply, indicating my popping knuckles, which apparently I was cracking without even knowing I was doing it.