Not sure if it's well-hidden on Youtube, was taken down, or if I just suck at searching.
There were a couple clips of what I'm told was a late 80's Great American Bash. Ron Garvin had taken a camcorder backstage and got some great candid footage of the Road Warriors, Dusty, Sting, Cornette, etc.
It might not have been butterflies. It might have been sickness that Verne finally had snapped and put the belt on his boy Greg. Remember, Greg Gagne has been banned from the frozen food aisle of most supermarkets.