This month's general meeting featured a presentation by Felix Khazin on the N6338F accident—he was a passenger in the rear seat. It's rare that you get a pilot rated third person's account of these incidents, so it was valuable indeed.
Key take aways:
1. A pilot rated passenger is never just a passenger. No one likes a "backseat driver" but a third pilot speaking up at a critical time can break that chain of bad decisions that leads to an undesired outcome. Take charge of your own safety and speak up, even from the backseat.
2. Don't be intimidated by a more experienced pilot, or assume that he knows best. Sometimes even the most experienced pilots make bad decisions.