As the FBI agent is getting into a helicopter to go to the scene of the crime, you can see a sign in the left lower corner of the screen advertising Helicopter Rides.
At the beginning of the movie as the voice over is describing the evil Doctor's work at the chemical plant, the Doctor and assistant walk to a door to enter the plant. As they do so, a crewmember in blue is reflected in the glass of the door.
A man is at home watching cartoons and drinking a beer. Next to him is a floor lamp with a black top and a large chrome ring. Two crewmembers are reflected in the chrome ring as the scene unfolds.
Cameraman's reflection in policeman's sunglasses.
During one of the investigations into the sewer a fog machine is seen in the left hand corner of the frame letting out a short burst of fog before the deputy is attacked.