The Seth Rogen-Judd Apatow movie-making machine continues unabated, but they've hit on something clever this time: they've brought in a director with credibility for heavier productions to lend more depth to their usual chuckle-fests.

And their choice, indie darling David Gordon Green (George Washington), takes what would otherwise be an enjoyable stoner flick and roughs up its edges rather nicely.

The premise is simple. A pot head (Rogen) witnesses a brutal crime and turns to his dealer friend (James Franco) for advice on what to do. But they are hindered by the fact that their personal slice of heaven - the strain of weed from which the film takes its title - has been left at the scene, so the bad guys can trace it back to its source. And so the chase is on.

In lesser hands than Green's this would have made for all manner of slapstick and mayhem. But he combines Apatow's clever, thoughtful (and at all times funny) dialogue with some tension-packed and ultra-violent action to give his audience something else entirely.

Superbad showed that Apatow - and writing partner Evan Goldberg - can give even the most tried and tested genre a fresh twist. And Pineapple Express continues in the same vein.

They play on the stoner's world of heightened confusion but throw in hard doses of reality every once in a while to keep everyone's feet on the floor.

Extras: 15 deleted scenes; two blooper reels; 13 (yes, 13) featurettes; rehearsal footage.