How… how on earth do you discover that you have an ability like this. Do you wake up one day and say “I wanna log-roll a table upside-down” and dedicate your life to achieving that goal? Are you lounging around the house and someone tosses an ottoman at you and you roll a 20 on your Dex check? How?
They were probably ballerinas or circus performers. They also probably balanced all kinds of stuff with their feet.