This is a video from the Parque del Cidacos in Calahorra, La Rioja, Spain of a controlled burn of the poplar fluff (the very fine, kinda dandelion-like seeds released by female poplar trees) atop the grass in the park. As you can see, the fluff burns incredibly quickly, leaving the grass below unharmed. The time I spelled my girlfriend’s name in gasoline in her parent’s yard and set it ablaze? Thank God their homeowner’s insurance covered detached garages!