There's one part in the Metallica remake of Whiskey In A Jar that I can't quite understand, but I think it sounds like 'your brains will come home in a jar.'
A childhood belief about misheard lyrics

others believed things like this
- I used to believe that people's brains differed in colours. I always wanted purple brains for some reason.— Katrina
- The tooth Fairy smoked cigars and smelled like whiskey.— Bill Reilly
- I used to believe the Metallica song "Trapped Under Ice" said "I turned down the rice."— Erik Z.
- My mum used to tell me that cottage cheese was cows brains. I still ate it. — Justin
- my mum once told me if you picked your nose your brains came out!!!!— smiley : )
- if you pick your nose your brains will fall out!Anon