On her plane ride home, Beverly is mostly shown sitting in a window seat. But in the shot of the stewardess collapsing into the chair, she is sitting in a center cabin seat.
When Professor Andromelek greets the students on the river, he says "dobra dan, which is good morning in Serbian-Croatian". At the time, Serbian-Croatian was the official language of the Former Yugoslavia, however "dobra dan" does not mean good morning in the language it is actually good afternoon. "Dobra jutro" is good morning in Serbian-Croatian.
Obvious model used for most scenes of the train running off the tracks. The grains of dirt and pieces of rock are much too large in proportion to the train.
The first time the track moves on its own, the string guiding it is visible.