As with most films featuring stand up comics in the lead role, there are bits of Andrew Dice Clay's routine in the film. This includes moments like asking the two guys in the club "What're names? Neil and Bob? Or is that like what you do?" The blabbering noise he makes after he leaves Johnny Crunch's radio station the first time. And referring to his genitals as "Stanley The Power Drill".
The closeup of the keys when Ford Fairlane arrives at the club at the beginning shows a much newer style of Ford key that what was made for that car. In that shot, you can see the correct style on the opposite side of the key ring (farthest from the camera view).
When Ford blows out the flame on the milkshake and then takes a drink, it is very obvious that he doesn't even touch the shake and it is also obvious that the 'slurp' is dubbed in.