Not to be a troll or anything but…
72 tons is like one or two tank cars and…
hurr durr did it melt steel beams?
Really just one tank car.
A good average is 30 tons per empty car and 100 tons loaded. At least for hoppers and tanks. Autoracks and pigs are stupid light even while loaded. Like only 30-40 tons.
No, but it gave JFK autism on the moon. Having said that, I might be getting my crazies mixed up.