I have the ability to arch my eyebrows. I can actually do it on both the left and right sides. When I was a kid I saw it on TV and thought it was cool, so I spent 3 days using my finger to arch my eyebrow. Eventually the muscles on my face became capable of doing it, and now its something I do without thinking (or whenever I want to tease someone :) ). My parents thought it was really weird that I was working out my eyebrows, and they still think its weird that I can do it. Haha.