When Jessie & Jason enter the nightclub, several of the people that the bouncer had turned away at the door are already inside the club.
In her close-ups, Kristy Swanson's makeup often changes in the same scene, from frame to frame, such as when she is on the bed talking to Jason or in the bathroom right after she has only applied lipstick; her eye makeup has completely changed, with suddenly unflattering darkened and much thicker eyebrows.
When Meshach Taylor impersonates a Marine he is wearing the uniform of a Marine Gunnery Sergeant ("Gunny") but he identifies himself to the policeman as a Staff Sergeant, one rank lower than a Gunny.
In the scene where count spretzals three bumbling bodyguards are walking thru the mall looking for the peasant girl after being dropped off by the trash truck they are all wearing black jeans with gold jackets yet when they finally find the peasant girl in the back dressing room with Jason they are all wearing biker shorts and tank tops..
In the scene when Jason is making breakfast for Jessie he throws three hard eggs up into the air then he catches them one by one in the strainer in actuality that's impossible if you throw any object or objects into the air they will all fall down together not one after the other seconds apart how Jason caught them..
I think any real Philadelphian would laugh hard at how Jason is eating his cheesesteak in the scene when he and Jesse are walking downtown he's literally pinching pieces of it out of the wrapper like he's eating cotton candy as opposed to eating an actual cheesesteak..
In the beginning, when Jason is looking for parking as he makes the U-turn to park, you can see the street blocked off and the people watching the scene being filmed.
The first time the mannequin close-up is shown, its eyes are brown but Kristy Swanson has blue eyes in her Jessie close-ups.
Hollywood Montrose acts puzzled and like Jason is completely crazy, when the latter is about to tell him that his girlfriend is a mannequin come to life. But this isn't Hollywood's first rodeo, considering that his character was already in the first mannequin film, where he was complicit to Kim Catrall's character being a mannequin come to life.