When the 767 approaches the Gimli airstrip, it's free of any obstacles. When it touches down and slides down the runway, it is still completely free. Then, a metal guardrail appears in the middle of it, allowing the aircraft to slow down quicker. When the aircraft comes to a stop, the guardrail is still there; when the passengers are evacuated and the racers help the Captain put out the smoke, the guardrail again disappears.
When the plane drops off the radar screen, it is still showing "FL410", meaning it was flying at 41,000 ft. In reality the plane had started descending while both engines were still running, and was closer to 26,000 ft when the second engine flamed out.
The aircraft on the ground being examined by investigators is obviously not a 767.
A man seen barbecuing beside the Gimli drag strip is standing behind a late 1990s Mazda pickup truck, but the scene takes place in 1983.