We almost had the answer to that very question.

John Bonham's son, Jason Bonham said his dad almost got into fisticuffs with the former lead singer of The Police backstage at a Police concert following the release of "Reggatta de Blanc". Apparently, John stepped on Sting's foot and Sting got very angry, prompting John to threaten Sting with a punch in the face.

Jason just completed a North American Tour with his Led Zeppelin Experience and is now working with his super group Black Country Communion. They just released an album this past fall.

For the record, my money would have been on John.