Sheer physics... The least amount of speed a plane will experience it terminal velocity.. So even at 100mph (whatever the speed may be to many variables to determine actual terminal velocity here), the plane would hit with such force that few living organisms would survive. The brace position usually only works in rough belly landings either on tarmac or water where the plane is near level before it impacts. In cases where the cabin has been depressurized you will usually pass out with in a minute or so rendering the brace position not practical (your not awake). If you manage to survive the impact the fire may kill you. The brace position is just a cute way of kissing your butt good bye..

Almost always the person coming from behind that runs into you is at fault. There are exceptions, like if you are backing up and someone runs into you, or if you have a long load sticking out behind you without a red flag or light on it., This could apply to the trailer if there were no lights.

Is it normal that if I drive at night I get completely blinded by other cars' headlights?

Whenever I attempt to drive at night I get blinded by cars on the opposite sides headlights. I wear both glasses and contacts, and I always have one or the other on. Is this normal? I am an inexperienced driver so I've only driven at night a few times but each time this always happens. I have to focus really hard and stare at the lines on the road, but even that is difficult sometimes.

It's not like you'll get a ticket after the fact. If a cop did see you go straight in a right turn only lane, yes, you would probably get a ticket. Just be more careful in the future, but don't worry about it now, it's over and done with.