On the DVD, the outtakes/deleted scenes are amazing.
Test audiences wanted more "Jay & Silent Bob" (huh?), and thus, Kevin Smith (stupidly) cut out most of Will Farrell's scenes. Thus, the deleted scenes is about 45 minutes of Will Ferrell.
Likewise, the audio commentary for "Anchorman" is an hour & a half of Adama McKay and Will Ferrell basically doing a radio show (there is NO actual commentary about the movie).