I answered
A monkey's tail
I could hide my tail under clothing if needed, but it would be useful to get away in dangerous situations. Like swinging from a chandelier during a bar fight, or under a canopy of trees if jogging through a forest. Imagine being stuck in traffic in Austin then suddenly there you are high above, getting through lights effortlessly like Tarzan. *Ah eee ah eee ah eee ah eee ah* Just keepin’ Austin weird.