"Corn dust is highly explosive"<br><br>Noted,(reply>), Make the dust small enough and it will ignite on exposure to oxygen, one example would be sub-micron aluminium powder.,(reply>), @Riley Mannion Beat me to it, if you powderize anything it'll probably become explosive at some point,(reply>), @Nethiuz a good amount of metal dust will do the same, what usually happens is a primary small explosion knocks all the dust in the building loose then a secondary explosion comes when all the falling dust ignites, the secondary explosion is usually much larger and more deadly,(reply>), <b>Stares at custard package in kitchen</b>,(reply>), If it can burn and it can become airborne as a particulate, it's explosive. Coffee creamer, flour, sugar, fine sawdust, dry starches, anything like that. Like imagine a campfire, you're trying to light some big logs just sitting there, it's a huge pain if you don't have the proper airflow. You take the same mass of wood, the same potential energy, but in the form of lots of little sticks that let air flow between them, air that the fire needs, suddenly it's so much easier! Extrapolate that to something very very fine, like sawdust, going in the air. A tiny spark is all it takes, like the kind machinery can generate with metal rubbing against itself. It catches fire so quickly and so strongly, that's all an explosion is really. All that energy being released at once in the form of heat and light. And it's incredibly common in factories, historically. You can take handfuls of things like that and throw them over a fire and they'll burst into flames, I've done it with coffee creamer before, and powdered sugar. Cautiously of course :-)