You’re supposed to be able to hear “fucking hell” at 2:57 in “Hey Jude”, perhaps due to some kind of cock-up during the recording. To me it’s buried so deep in the mix that I couldn’t be sure what is there. It could be anything that has some vague “uh-ih-ell” sound to it. But this is the Beatles we’re talking about, so elaborate theories are mandatory.
I read about that in Geoff Emerick’s book about recording the Beatles, and listened closely on earphones, and - yes - it is clearly ‘fucking hell’. But I wouldn’t have heard it if I hadn’t read about it.
I was surprised to discover that John Lennon repeats the phrase “Shoot me” throughout Come Together. Much like the two scenes in A Hard Day’s Night where the Beatles’s manager threatens to “murder Lennon” if he continues to misbehave, it’s eerie in retrospect.
What’s really spooky in retrospect is Lennon’s death scene in How I Won the War; he’s shot in the gut (but it’s obscured by an explosion, IIRC), and then he looks up at the camera, his hands covered in blood, and says, “I knew this would happen. Didn’t you?”