I dont know where she started out. It looked like she suffered damage to her femoral artery from the way they were working on here. She bled out before they got her on the gurney.
Lots of links and discussion here:
https://www.reddit.com/r/CringeAnarchy/comments/6trc90/actual_moment_heather_heifer_was_run_over_by_evil/
and here
https://www.reddit.com/r/CringeAnarchy/comments/6trc90/actual_moment_heather_heifer_was_run_over_by_evil/dln4bl2/