You're not going to believe this, but big businesses will do anything to make money.

The people at Enron actually attempted to market weather futures, just one of the funny-if-they-weren't-so-aggravating details revealed in "Enron: The Smartest Guys in the Room."

The documentary wobbles out of the gate - the opening re-enactment won't make you trust the film, and early scenes depend too much on Michael Moore-style snarky music and archival film footage. But "Enron" quickly settles down, cogently laying out how Ken Lay and other hot-dogging big shots sank the seventh-largest corporation in America, crippled the Houston economy and plunged California into darkness, to boot.

There are no revelations in "Enron" - the indicted principles didn't participate, so we don't know what they were thinking - but the documentary uses interviews with whistleblowers and journalists to organize the story so it makes sense to us. What emerges is a portrait of evil, of wealthy executives who cashed in their Enron stocks at the very moment when they were urging working-class employees to buy more and of employees who planned the rolling blackouts in California to bump up demand for energy.

"Enron" demonstrates that, despite their denials to Congress, these people had to have known that what they were doing was amoral. What it doesn't do is tell us what the heck was wrong with those people.