And they walked away
Mario Andretti Crash
On the page linked to above, click the "Mario Andretti crashes at IMS" link to see the video.
Unbelievable. He walked away from the crash.
Background: Mario, age 63, is doing testing for his son's IRL race
team, filling in for an injured driver. While testing at the track he
hit debris from an accident that had just happened, causing Mario to go
for a ride.
A similar incident happened at LeMans in 1999:
Mercedes Flip
This time is was just a poorly designed car. Believe it or not, Mark Webber flipped it two days in a row during practice, and then wisely refused to get back in it. A subsitute driver flipped it again during the race.