Have you ever seen white, fluffy cotton-looking stuff on the ground by the grass? That’s most likely cottonwood seed. If there’s enough it can easily light on fire. It’s not very safe to do so, but PBlaze Blazeon lit a big pile in 2013 anyways. Only now has this video gone viral. They claim to have a fire extinguisher ready, so please don’t try this one at home. Just enjoy the trippy results on video.