It's an obvious toy train shown running off the train tracks at the end of the movie, followed by stock footage of an explosion and burning building.
The strings on the killer insect can be seen when it first starts to fly.
When the camera moves through a pair of double doors and we are shown body parts and blood splattered everywhere, the cameraman's shadow and/or reflection in the glass doors is constantly visible throughout the entire sequence.
A crew member can be seen moving his feet out of the way, and out of view of the camera and reflection on the glass under the body Moll has just sawn into pieces.
Lighting equipment visible at the top of the screen many times throughout the movie, during the sequences of the band performing in the train car.