Once i stock my car in a field, and i though my father will bring the tractor to help me, but just with a little tools to lift up the car and he put somes planche under it was enough to go out.

And nice "street workout" (actually it's more a wood beach workout ^^) with the wood, great idea i like it. Be Careful to your back when you do this especially with additional weight. When you are beginner or you did not warm up i don't advise to do this move with additional weight if you did not do it a lot without weight the month before.