Normal speed just east or west of WFH is fairly slow, nowhere near 79 mph, so not sure about how much emergency braking was required. I was on an EB that hit a truck at 79 mph several years ago and even then, while it was somewhat jarring, stuff didn't fly thru the air.
Oh, that's certainly true, though I one informant did describe a burning smell coming from the sleeping car's brakes. Perhaps a brake line decoupled in the incident and dumped the air.
From my personal experience, in a bedroom upper bunk you can wake up thinking that you've flown through the air, and only were saved by the crash netting, over an incident that would probably have been far less noticible if you were awake.
In defense of the Empire Builder's dining car, I usually only have breakfast in it if the train is running near time. In all of the cost cutting, one thing remains. The oatmeal is still old-fashioned steel cut oats, probably made overnight in a crockpot. I always expect that Amtrak will switch to the wallpaper paste called "instant oatmeal," and to my taste the grits are instant, but so far they've held the line on the oatmeal. As long as that holds true, I'm willing to use a plastic spoon. I do get an odd look, though, when I ask for Tabasco for the oatmeal.