Another consideration to make is that to leave such equal L/R marks, a/c must have been wing level when drifting on the grass. It appears that PF had managed to handle that aspect of the situation following a stall and wingtip contact, but he couldn't do anything more than that.
I'm honestly convinced the outcome would have been very different if the the terrain didn't featured such a plane-breaker ravine.
After all, if a plane stays intact in a crash, there is a chance that there will be no fire, that is the ultimate killer.