A TMZ cameraman recorded the incident. Durant was walking, then opened the door of an Escalade SUV and the plastic bottle tumbled to the ground.
"Uh oh, dropping the weed," said the guy in the white t-shirt and sneakers, who picked it up.
Durant missed most of the 2014-2015 season due to a broken foot and followup surgery. He's led the NBA in scoring four times, and was last year's Most Valuable Player and Rookie of the Year in 2008. Durant was the second overall draft pick by Seattle in 2007; the team moved to Oklahoma City in 2008.