Factual error: Shirley MacLaine and Jack Nicholson both live in River Oaks (very ritzy neighborhood in Houston) and are traveling to Brennans restaurant in downtown Houston maybe 5-10 miles away - but they go by way of Galveston which is about 45 miles south of Houston - which needless to say is way way out of the way... (00:50:40)
Factual error: When Stefen leads the Ampipe team onto the field to play Walnut Heights, they run out onto the Point Stadium field. The locker room they come from is at the Johnstown Vocational and Technical school, which is in Richland Township. The Point Stadium is in downtown Johnstown.
Factual error: Part of the movie takes place in Vienna, Austria. Although the number plates of the cars are like those in Austria at that time, neither the road markings nor the street car which can be seen when both Steve Martin and Kathleen Turner are "climbing" outside their hotel look like those in Vienna.
Factual error: During the huge thunderstorm which causes the fire you can see that it's actually a bright, sunny day with only a mild overcast. Several times you can see the sky in the shots and though sometimes lightning bolts are visible there are only a few light clouds on an otherwise blue sky.
Factual error: When they drive away at the end they say they are going to the Valley Sheridan, but when the camera pans out they are really going in the opposite direction towards Santa Monica. (01:35:35)