Unable to maintain my Zen-like serenity

So I was in a yoga class this morning and feeling pleased with myself because it was the first time I'd been able to maintain my balance nearly perfectly in a very respectably executed vriksha-asana, or tree posture.

The person closest to me, a woman who just recently began coming to the class, whispered "Hey!" in a quiet voice. Being me and so full of myself that I'm in danger of choking on my own eyebrows, I turned my head, ready to graciously accept her expressed hope that she, with many weeks of arduous practice, would be able to do a graceful and balanced tree like mine.

Instead, she pointed at my left ankle. "Hon, you've got a panty liner coming out of your pant leg."

I physically felt my face change. My mother and I both have a problem with this. While trying to express an outward attitude of calm and generous tolerance, it's often perfectly obvious that what we're really thinking inwardly is, "Oh, shut up, dirtbag." I tried to rearrange my features into a gentle smile while bending over to remove the DRYER SHEET from my pant leg. I crumpled it up and dropped it into my gym bag and briefly considered interrupting the class so that I could whack that woman in the side of the head with my water bottle. Just as a helpful measure to correct her faulty vision, you understand.

Panty liner, indeed. I am never standing by that hag again.