coming from someone who has recovered and been recovered in off-road situations before, this looks like a shady setup...
line not designed for the forces at hand, metal rings (?) tied in the middle, all adds up to a dangerous and potentially deadly recovery. look at it this way - be glad the rope didnt snap under pressure and send that metal ring through your windshield at high velocity.
that said, good for you for helping out a friend. just leave it to the pros with the right equipment next time (or use the shovel and a push by hand). it really doesnt look like it was stuck so bad that it required a snatch-type recovery anyway.