I made it in plenty of time for my train departure and sat in the station a while. Lots of Vietnamese find it comfortable to sit on their haunches like this woman is doing. I guess that is why they prefer those squat toilets you find in so many places including the train carriages.
I needed the quilt to keep me warm during the night because the A/C was blasting out within inches of my head. It was very tough to wiggle out of the top bunk in the middle of the night for my bathroom break, but otherwise it was a comfortable sleep.