Check out this video showing giant tumbleweeds causing traffic to stop on a highway in Salinas, California. A tumbleweed is the dry part of a plant that tumbles around a desert-like area after its been seperated from its root by wind. It is a symbol of the American west, and you’ll often see them in western movies. Usually they are a lot smaller than the ones in this video. Haha, it’s the attack of the giant tumbleweeds!