Yes, Cobster, it was a pre-mix in the bag, not a one-shot into the feedline. I imagine one of the shots before/while/after they were inserting the lung-suction tube may have been morphine,(for sure there was a coke-like component) but at that point I was quite happy to have painlessness hit me like a truck, so I could appreciate how cute the HS-age surgeon was.
Hoping there isn't a next time for you, but if there is, the docs might appreciate and make use of your warning about how you react to morphine.