This is a spinoff of the "Artest returns to practice" thread in which a writer opined that the Palace brawl might have been the most frightening event in sports histroy to be recorded on video.
So what were the most frightening events (recorded or not)?
Just off the top of my head
1) Monica Seles stabbed
2) Father/son attack first base coach in Chicago (Gamboa?)
Then there was that Detroit player who ran into the stands and beat up a cripple who had been heckling him.
What else was scary?