a friend of mine who's doing medicine told me that asians have some crazed genetic thing where they can bend the top join of say their second finger without bending the lower joint, whilst caucasians can't do it! so she made me do it in case pianists have developed enough strength to do it, but i can't. then i made 3 of my asian friends do it last night, and they couldn't do it either...so now everyone here has to try it!! and you're not allowed to hold your lower joint in place, and the bend has to be pretty significant. do reckon if you practiced trying to do it it'd strengthen your top joints more?