I agree, but there were conflating stories about the knocking for decades. That MJ is listed as "drum case beater" in the credits is surely not helping. Howeve

I agree, but there were conflating stories about the knocking for decades. That MJ is listed as "drum case beater" in the credits is surely not helping. However this HS interview was done at least 15 years after, a time after which I assume any secret joke they conspired must have worn off. I've listened to a rerun from that interview, which might was recorded in 1998 (http://marksfriggin.com/news98/3-16-98.htm http://marksfriggin.com/news98/3-16-98.htm)