The thumb on my left hand bends funny. I guess you could say it's double-jointed where it joins my hand? I have had to work around it some in fiddle playing, especially when Teacher was showing me how to do vibrato. I can put my hand palm-down on the table and lift my ring fingers independently------ some people can't and I haven't always been able to.

Also, I understand that only 1 in 35 people are physically able to yodel. I can do that, too.