Thats just what we call it.Changed name to fit more.
What all can he do with his shoulders?
he can do a full circle by bringing his arms behind his back then forward again.
Well hell I can do that. I always thought it was a normal thing :/
yeah, rightuntil you post a picture of yourself doing it or a video i say no
Also, my bio teacher is double jointed.He can walk with his feet sorta backwards.
the tops of my fingers are double jointed :D
Can you bend them independently of the rest of your finger?If so, that's not being double-jointed.
That is nothing. You should see my brother's fingers.