Continuity mistake: In the scene where Jjaks and Freddie escape and are driving in the red car, she opens the bottle of champagne and takes a drink with her right hand then hands it to Jjaks with the same right hand, but when the camera cuts to Jjaks, she is handing it with her left hand.
Continuity mistake: While Jjaks and Freddie are talking for the first time, at the wedding, the level of beer in Freddie's bottle rises and falls.
Continuity mistake: In the scene where Freddie and Jjaks are in the bathroom during the wedding, they are standing in front of the mirror talking and her dress keeps moving on and off her shoulders during the whole scene. (00:17:15)
Continuity mistake: In the scene when Jjaks goes back to rescue Freddie and they are driving in the car drinking champagne, her hair keeps moving from in front of her ears to behind her ears during to whole scene. (00:30:55)
Continuity mistake: When Det. Costikyan hits Jjaks while interviewing him, you get a short but clear view of Jjaks' right ear and it is undamaged.
Chosen answer: Yes, it does just vanish. It is understandable that we don't see it for the 2 remaining days of the main plot of the film. The car is impounded somewhere and Jjaks has a lot more to worry about than where the car is. He also has no money during those three days. A couple of possible explanations, excuses really : (1) the car was impounded by a private company, not the police, and Jjaks can't afford to get it back. (2) He did get it back. The Las Vegas scene happens 'several months later' and in that time Jjaks lost or sold the car.
jle