If you took the sci-fi element of Pluto Nash, mixed it with the outrageousness of Steel, and added in the really bad dialogue from Paycheck, Serenity would be the result.
From this ridiculous review of the movie. It looks like there are vague spoilers (basic plot things), but nothing bad. I skimmed, mostly. But there are some great gems:
The cast is all unknown actors, and considering the director had only done television productions up until now, I was a bit skeptical.
The caliber of the special effects were out of a video game
This movie might just demand a certain tolerance that I just don’t have. The director created Buffy the Vampire Slayer, and that’s a show I’ve never been able to endure (and my complaints are similar). Television in general can be very subjective; some programs are entertaining to some people and ridiculous to others. A lot of television is there for mindless entertainment, and is programmed so that viewers can have it on in the background so you don’t have to watch with your full attention. And the problem with Serenity is that it didn't seem necessary to watch with my complete attention.
And the kicker:
I have a hunch that this movie might not even get a theatrical release (if it does, it could be a very limited release like Below). I was having a hard time imagining it playing in many theaters, let alone anybody showing up; even undemanding moviegoers might walk out. This is the kind of material anyone can see on television for free, and in only a 42-minute time frame (without commercials) versus 120. Serenity is an early contender for the worst movie of 2005 and is one of the worst movies I’ve ever seen, period.
I don't intend anyone take this guy seriously, but it's fun to laugh at him.