I can personally testify as to the strength of today's windows.
"FRA glazing" is defined as being able to be strike a full size cinder block (8 x 8 x 16) hung from above by a rope, at 75 MPH, without shattering.
in the earlies days, before it was actually a law for FRA glazing, I was riding in an Amfleet coach, pillow and head against the window, when someone threw a brick and it hit my window even with my ear. Turns out that back then, something weaker than today's Lexan was the inside layer, with glass on the outside (to keep the plastic from scratching). When I climbed down from the luggage rack, I saw the brick balancing for a few seconds on the shattered glass layer before it fell off. Far better window glazing later eliminated the glass layer.
BTW, the stuff they use today ISN'T Lexan-- read the label. It takes special tools to cut, bend, or drill the stuff. Anything else will just bend, warp or stretch it. Drill a hole and the resulting hole will be smaller than the drill bit after it cools. Cut it and the moment you stop cutting or even slow down, it'll grab the blade and not let go. A proprietary process (far more involved than just heating) is used to bend windows for SuperLiner lounges and Dome Coaches.
Episode two took place on the Southwest Limited (before renamed back to Chief). Several passengers got into what had to be the biggest argument I've ever seen in my life; State Police/Sheriff were called to meet the train in suburban nowhere, and a huge guy took a full-sized suitcase and threw it against a lower lounge window. It bounced, and came back at him just as fast as he threw it, and knocked him senseless. I noticed later that the Sheriff had to pull hard and leaned to port quite a bit to remove the suitcase from the train.
There are several accounts of sideswipes with freight trains where the glazing kept some heavy stuff out of the passenger cars. Window was destroyed, but kept pax safe.
Pull-out windows were installed system-wide after the Coast Starlight sleeping car fire. Luckily, the old HiLiner cars happened to be able to accept SuperLiner windows, thus extending their lives (there was a proposal to eliminate them due to anticipated costs of custom windows); Trans-dorms were refitted with the smaller Amfleet pull-out windows and a one-inch filler plate of stainless steel.