glitchphil and I talked a bit about movies, and gave me a bit of a history lesson. Back in the early days of movie making, production companies had a set amount of cash and a set amount of films to make. The classics were where most of the cash were poured into. The rest they produced were filler; their quality suffered as a result, and they were called B Movies (like the B side of old turntable records).
When I refer to "B Movie" I'm mostly referring to how bad they were. Of course, there's good B Movies, and then there's so horrible B Movies that they're hits.
Snakes on a Plane (which I haven't seen) was produced to be a B Movie, a cult classic. The rendered TMNT feels like it's B Movie quality. Garfield... isn't a B Movie.