The film's credits run for nearly ten minutes. At the time of its release, Who Framed Roger Rabbit held the record for having the longest end credits sequence in cinema history.
Ever wonder what all that technical jargon that Judge Doom rattles off about his "Dip" was all about? The Dip, which he tells Eddie is a mixture he has made out of acetone, benzene, and turpentine, is the only way to kill a toon. Why? Because these are essentially the three main ingredients in "Paint Thinner" - which he uses to literally remove a toon's paint, thereby removing their existence.
Another scene of Jessica's exposure can be found when Benny the cab crashes into the lamp-post after sliding through the puddle of dip. She and Eddie are thrown from the car, and spin around. As Jessica spins, she is seen to have no panties on. This is only visible on the original VHS and Laserdisc versions. On the DVD, fabric from her dress has been added to cover the exposure.
In a bit of irony, Bob Hoskin's live-action character Eddie Valiant had to be animated in a few quick shots during the car-chase with the weasels and Bennie the cab, due to the high-speeds and/or chaotic movement, which would have been too dangerous (or too impractical) to do with Bob Hoskins or a stunt-double. These shots (which actually look fairly creepy, due to Valiant's animated form falling into "uncanny valley") are most easily seen by going frame-by-frame in certain quick shots.
The title has no question mark at the end, because according to director Robert Zemeckis, there's an old superstition that films with a question mark in the title do badly at the box office.