Here's another take. Who knows about mudras? Mudras are those hand poses you see figures like Quan-Yin and Shiva and Krishna making in paintings, statuary, etc. They aren't random. They all have meanings. Has to do with activating nerve endings in your hands and fingers that in turn activate energy centers in the body. Anyhow, the middle finger represents patience. I have heard it said that when you hold up your middle finger by itself, it means you've lost your patience!

Makes sense to me, anyhow.