Date: January 31, 1977
Location: Chicago International Amphitheatre in Chicago, IL
Successful Jump: No
Injuries Sustained: Two broken arms

This jump would have been way more dangerous-and ranked way higher on this list-ha Knievel actually been able to attempt it. Instead, he lost control of his Harley during a practice jump, crashed into a cameraman, and ruined the main event. But, when you consider the other things that could have gone wrong with this particular jump, that might have been a best-case scenario for him.