From Mental Floss

George Carlin tidbit:

His mysterious disappearance: Carlin was the host of the first episode of Saturday Night Live in 1975. His albums were million-sellers and his live performances were always sold out. Yet he seemingly "disappeared" in 1976, at the height of his fame. It wasn't revealed until many years later that Carlin had suffered a heart attack. Heart disease was hereditary in his family. His father had died at age 57 due to heart trouble. As Carlin put it, "His first symptom was a trip to St. Raymond's Cemetery."