Tim Avery, an aspiring cartoonist, finds himself in a predicament when his dog stumbles upon the mask of Loki. Then after conceiving an infant son "born of the mask", he discovers just how looney child raising can be.
- Genre: Fantasy, Comedy, Family, Adventure
- Studio: New Line Cinema, Pathé Distribution
- Keyword: baby, mask, villain, transformation, viking, slapstick, superhero, based on comic, surrealism, dog, urban setting, wisecrack humor, super villain, norse mythology, supernatural power
- Cast: Jamie Kennedy, Alan Cumming, Traylor Howard, Kal Penn, Steven Wright, Ben Stein