After filming the sequels The Bourne Supremacy and The Bourne Ultimatum and the semi Bourne-y upcoming thriller Green Zone, you couldn't blame director Paul Greengrass for needing a change of pace. Amid rumors that he and Matt Damon would re-team for a fourth Bourne film, Greengrass effectively squashed the possibility that he'd return to the franchise that made his Hollywood career back in December. Doing press for his latest film this week, he set the record straight about his change of heart.

In an interview Friday with CHUD's Devin Faraci, Greengrass explained why he had become burned out on Bourneand what his quitting the franchise meant for his relationships with its studio and star. Despite his decision against continuing with the franchise, he thinks another sequel could be made -- just without him at the helm.

"I didn't have the fire in my belly," Greengrass told CHUD of the potential fourth film in the series. "Not that I don't like Jason Bourne, not that I'm not extremely grateful to the franchise, not that I'm extremely close to the studio - there were no arguments. I didn't feel like I had anything else to contribute. It just happens with franchises; you get to a point where you feel like you've done it." (Read more here.)