Okay, I’m lost here....
I was referring to Megadeth, founded by Dave Mustaine in 1983 after he was fired from Metallica.
Megatdeath took their name from the one-off band from National Lampoon.
John Belushi, Chevy Chase and others, and they were heavy and used music to kill.
The optics are not good.
Song here
https://www.youtube.com/watch?v=aEzA7AEM56A
Full 1 hour HBO special from 1973 here
Jump to 48 minute mark for Megadeath
https://www.youtube.com/watch?v=tuBhwEgi8qU
Christopher Guest years before he was in Spinal Tap