linky?
Might take some digging (keyword, “Provenzano”?). Can’t give you any other specifics. It might be out there on the interwebz but I have never searched...I saw it live.
My memory might be a bit foggy but I believe I was in college at the time (so, circa 1976-1982) and saw it during dinner. Talk about your fried chicken spit-take. My older brother and I needed oxygen to recover.
Andy and Cathy came out of the commercial break like nothing happened (consummate professionals?)