Sophie is seriously double jointed in her thumb. She can nearly touch her wrist with her thumb. This was discovered when dressing her in long sleeved tops. Hold your hand up and see how far you can stretch your thumb back. Mine only goes 90 degrees making a L. Can't get yours too far, huh? She also has a little bend in the top knuckle of her pinkie. I've heard the bent pinkie is a Ds thing, but I don't know about the thumb thing. Cool Tricks!
(as always, click the pic to enlarge)