Thanks in large part to Jim Carrey's cartoonish physical performance, I think I'll always remember this crime spoof as a Looney Tunes episode! I believe this is his best comedic performance ever. But the humor itself in this movie is, surprisingly, quite witty and clever.
In its first act and most of its second act, Tom Shadyac fully embraces the movie's goofiness and absurdity, thus generates some inventive and crafty comedy set pieces out of them.
In the second half, everything goes gradually downhill. The plot begins to lose its sharpness little by little, as well as the humor, which ends up relying merely on gross-out gags and low-brow, dirty jokes. The movie also has its slow, and monotonous, parts; but this is not before it has delivered some very big laughs that almost made me choke.