Canadian actor Lloyd Bochner spoofs his own performance in the famous 1962 episode of Twilight Zone (1959) entitled "To Serve Man" in this picture. In a panicked crowd scene late in the film, Bochner can be seen carrying a large book with "To Serve Man" on the cover and shouting to passers-by, "It's a cookbook! It's a cookbook!," which was the shocking reveal in the Twilight Zone episode.
The pictures displayed in the Loser's Bar include: the Hindenburg, the RMS Lusitania sinking (often confused with the Titanic), the 1906 San Francisco earthquake, the Ford Edsel, the DeLorean DMC-12, the Hubble Space Telescope (considered a failure at the time), Neville Chamberlain and Michael Dukakis.
Right after Frank, Nordberg, and Ed reach the roof, they are fired on by 2 gunmen, one with a submachine gun and the other with a pistol. The gunman with the pistol fires 4 rounds at the three detectives, but only one shot produces a muzzle flash.
In the opening scene, Captain Brumford mentions that Frank's rank is Lieutenant. When Frank begins his opening narration, he mentions his rank as Sergeant. This is not an error but a running joke in the series that comes from the original Police Squad! TV show, where Drebin would be referred to as several different ranks through an episode of even in the same sentence. Frank's full, official title is "Sergeant Frank Drebin, Detective Lieutenant Police Squad", which is a fictional amalgamation of three different ranks of police officer.
Zsa Zsa Gabor: [having slapped a police officer because he pulled her over for running a red light]
Ach, this happens every fucking time when I go shopping.
Lt. Frank Drebin: [describing Jane; voice-over]
I couldn't believe it was her. It was like a dream. But there she was, just as I remembered her. That delicately beautiful face. And a body that could melt a cheese sandwich from across the room. And breasts that seemed to say... "Hey! Look at these!" She was the kind of woman who made you want to drop to your knees and thank God you were a man! She reminded me of my mother, all right. No doubt about it.