To get some ancient history here, take a look at the first photo in this thread:
Broken Jag rear - WARNING!
It broke near the outer end. Still not completely sure how; it could have been the impact with the berm at Summit Point's turn 3, or...
Just an historic FYI!
BTW, the car has been rebuilt, has 30K+ miles (20K since the crash) and has been tracked at many places such as Roebling, Daytona and Sebring without incident. I do check for cracks before each session, and, yes, I never go on track without wrist restraints!
Tom