This is a fantastic story on so many levels.
The only one I can tell that comes close is when I went to the Vixen/White Lion/Ozzy concert in Glens Falls, NY, on July 01, 1989.
When White Lion played their hit "When the Children Cry," (which is not a love song, but slow), a guy and his girlfriend starting slow dancing on the stairs. Another dude told them to sit the f*ck down. Next thing you know, the other dude's girlfriend starts swinging at the girl dancing, then the guys get to swinging. It was awesome. All four got tossed and never got to see Ozzy.