The Backyard Scientist Explodes Propane-Filled Balloons With a Drone, Under Water, and With Flaming Steel Wool

In a recent video, The Backyard Scientist explodes propane-filled balloons using a drone armed with a sparkler. Taking viewer suggestions, he also pops some of the balloons using flaming steel wool on a string, and also ignites balloons filled with a mix of oxygen and propane underwater.