Yeah, it's fingers. I just recently read the Complete Beatles Recording Sessions book and the author said that it was actually Ringo that yells the phrase at the end of Helter Skelter. I always thought it was John too, but I suppose it makes perfect sense.
"I've Got Blisters on My..."
A 15 year old recently told me that the correct phrase is "I've got blisters on my feet". I immediately corrected him and said "fingers". He said I was the one who didn't know his Beatles and it's "feet". Who's correct?