1. Black and White films are tools of the Devil.
2. Deadworm, where's
other ?
3.
http://imdb.com/title/tt0033729/
EDIT: What about films that are in color for half of the film and are in B&W for the other half ?
Case in point...
http://imdb.com/title/tt0120789/ (Crap) and
http://imdb.com/title/tt0116141/ (Too mushy for me)
There may be better examples out there...