Though Proctor's first name is never mentioned in any of the Police Academy movies, it does appear in the script for this movie. The description of his first scene refers to him as Sergeant Carl Proctor.
When there is a fight at the Blue Oyster Bar and Hooks go to find the address, Proctor says the address is 621 Cowan Avenue. When Mahoney and Hightower get there, the number on the door says 655.
When Mauser is thrown outside nude in public, you can briefly see his white underwear. However, this is applicable only to the open-matte full-screen transfer for the home video release. When presented in its original aspect ratio, this detracting detail is not visible.
In the Japanese restaurant scene, the teppanyaki chef greets Pete Lassard (Howard Hesseman) by saying "ohayo gosaimasu, ohayo. Good evening." "Ohayo gosaimasu" is Japanese for "good morning." "Ohayo" is a less formal way to say the same thing.