Ditto with the toes & feet. I'll use 'em for everything from opening cabinets to flushing the toilet in public restrooms.
Also, I'm invisible. Not only do I move really quietly and speak very softly, but most people just don't register my presence until they bump into me. It's not just some subtle disregard, either - it's pervasive, bizarre, and creepy, like you wouldn't believe.