Factual error: When Wayne and Garth are driving to the Alice Cooper concert in Wisconsin, they pass palm trees while driving the expressway from Chicago. There are no palm trees on any expressway in Illinois or Wisconsin. (00:57:00)
Factual error: In some of the shots of the band playing, it is very obvious that Cassandra isn't playing her bass correctly. Particularly in the basement performance, where she sometimes doesn't even move her arms at all while singing. (00:13:25)
Factual error: When Wayne and Garth drive to Milwaukee, they leave Chicago, the sign reads Wilson Ave, when they announce their arrival - a very similar shot pops up reading Wilson Ave.
Factual error: When they are driving around listening to Bohemian Rhapsody in Garth's car they are supposedly in Aurora, IL but Cermak Plaza is in Berwyn, Satchel's is in Cicero and the White Castle is in Lyons. All these towns are an hour away from Aurora.
Answer: You presumably haven't seen Terminator 2. The actor playing the cop is Robert Patrick, who played the shape-shifting T-1000 in that movie, who masqueraded as a policeman for most of the film. The T-1000's mission was to track down and terminate a boy - hence the "have you seen this boy" line that he says to Wayne.
Tailkinker ★