Did you ever hear bits of chatter, background noise, coughing and such - while listening to old Beatles records?
What Goes On has a list of these types of anomalies heard on Beatles records - including the infamous Lennon F-bomb during "Hey Jude".
Everybody knows Lennon sang "cranberry sauce" (or was it "I bury Paul") at the end of "Strawberry Fields Forever"... but did you know somebody sings "Hit me with a pizza" during "Across The Universe"...?