As mentioned earlier, I might be halftway senile by now, but I really need to pick a nit with my 3 or so fellow posters:
A foot elbow would be a knee, not an ankle … an ankle would be a foot wrist…
If I don’t recall a person’s name, I normally salute him with: Master, Professor or something “charmingly quirky” … still better than: Hi there, aehh - aehhh …