If you made a list of "explosive" things, you'd probably lead with gasoline, oil and lighter fluid. But dust? We're guessing it would be in the #55-60 range, between "dolls" and "milk".
These Canadia firefighters discovered the hard way that a furniture factory silo full of these tiny particles catches fire really easily when suddenly exposed to oxygen! Miraculously, the layers of fire-resistant clothes and filtered oxygen masks keep these steely heroes out of harm's way.
