Orginally Stan Lee was not going to have a cameo in the movie. Kevin Smith had written a fictional Stan Lee-type character but through a connection Stan Lee was asked to be in the movie and agreed.
Kevin Smith:
[comic books]
Brodie is a comic book collector; there is a comic book store in the mall; comic book creator Stan Lee appears in the movie; Brodie and T.S. discuss Superman's sex life.
Rene Mosier changes through at least three outfits during the course of the day. That's because she's been shopping and buying new clothes (see also trivia).
When Jay and Silent Bob are being chased by La Fours, they run into a dead end. Silent Bob reaches into his coat and pulls out a vibrator, then throws it away. He pulls out an inflatable doll, and throws it away. Then he pulls the Batman-like gun from his belt, shoots the grapple hook, hugs Jay to him, and they fly up out of reach and view. La Fours arrives at the dead end, but the vibrator and doll are nowhere to be seen.
When Brodie is playing hockey in the beginning of the movie he says he is in the middle of the second period, but the clock in the lower right hand corner of the television is counting down from about 20 seconds.
What ever happened to the 5 disc 10th Anniversary Edition DVD?
A
The 10th Anniversary Edition DVD came out in 2005, but in the Special Features Kevin Smith stated that the DVD was going to be a 5 disc set, but for some reason it was only a 2 sided 1 disc DVD.
Q
What are the differences between the Theatrical Version and the Extended Version?
A
The Extended Version of Mallrats was exclusively released in North America for its tenth anniversary. One has the opportunity to watch a eleven-minute-long video commentary by Kevin Smith (director and screenplay writer) and Scott Mosier (Cutter) explaining the origin of the second version in a very casual and ironical way.
Basically, the Extended Version only contains extended scenes. The alternate footage / takes are usually longer and some comedy have been added. Lots of the extended or alternate scenes are referring to the prolog of the Extended Version , they wouldn't make any sense at all in the Theatrical Version. The entire footage has probably been removed from the Theatrical Version to reach the appropriate length of 90 minutes. A detailed comparison between both versions with pictures can be found here.