This is an inspired comic Western, deserving comparison with "Blazing Saddles," from which it borrows a lot of farts. The more movies you've seen, the more you may like it; it even enlists big bats to lampoon the helicopter attack in "Apocalypse Now." But let's say you haven't seen lots of movies. Let's say you're a kid. "Rango" may surprise you because it's an animated film that plays like a real movie and really gets you involved.