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.
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Weaponry & Tactics HEAT Rollover Training Pt 1 2015-10-24
HEAT Rollover Training Document Files