Dave, in a situation like yours, drivers were instructed to stop the vehicle, turn on the 4 ways and direct traffic around your vehicle. Put the vehicle in first gear and set the emergency brake if you have one. Make sure that first gear and the emergency brake will hold the vehicle. Get out and put out your flares and a block behind your rear wheels. Reenter the vehicle, step in the clutch slowly and release the emergency brake slowly and make sure the block will hold the the vehicle. Then restart the vehicle, place it in first gear and move it to a safe, level place to park and retrieve your flares and blocks. This safety precaution has been published in safety manuals since the 50's and probably before that. The bottom line is: If you are rolling backwards and hit someone, you are at fault. If a vehicle rear ends a stalled vehicle, they are at fault. Never allow your vehicle to roll backwards.
