I remember growing up and listening to my brothers "Boogie With CH", "Future Blues" & "Hooker 'n Heat" albums.
Years later I was amazed to learn that they were playing a bar show at a small military facility in California (1979 or '80) where I was going to school. Well, as they went on "the Bear" took ill, and never fully made it out from behind the curtain. Heat went on (for a short while) anyway and it was pretty awkward. I remember that at one point, he was prone, behind all the gear, with a mic (which would soon be confiscated by a bandmate).
I'd blame the airline food, but I think they were from California.
Too bad, that tiny club was usually booking stuff that no one wanted to listen to, let alone go see live. I dragged a whole bunch of people down there to watch this train-wreck...oh well, I was 18 years old and they had .50 cent screwdrivers...which, come to think of it, might have been the cause of the problem.