Eddy currents, going down each side of the train? Trying to visualize this.
It was a Burlington Northern freight train. Burlington Northern freight trains go within half a mile of my house and they only seem to do 30-35 mph - that’s on a straightaway that parallels the freeway.
When we were kids, when the train would go by, we’d often run down to the tracks and stand about 10 ft away and watch it go by.
I’m sure a fast-moving train would produce buffeting air currents that might cause a person to stumble or fall, but I’d be very surprised if that freight train did.