This is a military HEAT Rollover Training instructor package. HEAT is Humvee Egress Assistance Trainer. They had a humvee body on a rotating shaft which sat off the ground to simulate a rollover. Though you may lack the rollover simulator, the principles are here. There are some vids and documents that may help in such a situation.
Weaponry & Tactics HEAT Rollover Training Pt 1 2015-10-24
HEAT Rollover Training Document Files