If you're out at Makaha this week and you see Matt Damon, don't blink. He won't be there long. The popular actor will be in Hawai'i to film a short segment for the upcoming Warner Bros. movie "The Informant."

"We are only shooting for 20 minutes, in and out," said Spooky Stevens, publicist for the production. "We're only in Hawai'i for 48 hours. It is just one quick little scene we need in Hawai'i. Most of this will be interior shooting, oddly enough."

Damon plays whistleblower Mark Whitacre in the true story about a price-fixing scheme involving agribusiness giant Archer Daniels Midland Co., which involved the company in a federal court case based in Illinois. The saga later became a novel by Kurt Eichenwald.

Whitacre was a rising star at Archer Daniels Midland in the early 1990s when he began to secretly gather hundreds of hours of video and audio evidence about the company's price-fixing tactics. He would later turn it over to the FBI, which just this spring publicly lauded Whitacre as "a national hero" because of what he did.

Damon and crew are said to be shooting at Makaha Valley Country Club, but Stevens would not confirm the location. "We are a closed set," he said. "We don't discuss where we are shooting."

Makaha was the setting, however, for a secret meeting in March 1994 between Whitacre and an executive from Japanese agricultural company Ajinomoto, which eventually paid heavy fines in connection with its part in an illegal cartel.

According to federal court papers, they chose the location because it was convenient and the golf there was good.

"The Informant" is scheduled for release in March 2009. The film is being directed by Steven Soderbergh.

Damon has appeared in "Ocean's Eleven," "The Bourne Identity," and those hit movies' sequels.

The filmmakers will be bringing only a few of the actors. They previously advertised in Hawai'i on Craigslist .com for background extras. "We are bringing some crew and Matt Damon and a couple of actors you never heard of," Stevens said. "We have a cast that is pretty much unknown."