Now, when it comes to my sensei... he's got wrists like rubber tree trunks! You'll just hammer and twist away at nikkyo with him and he'll give you a smile and lie down for you calm as anything. Oh how polite he is!!
Indeed... we have a 'rubber' guy as well. [reminds me of the scene from the 2nd Harry Potter film where Harrys arm goes all gooey]
Wouldn't mind a bit more flexibility in my wrist...