Originally Posted by Demonix
WTF?! Do explain how this would happen please.
It's not that uncommon, it's happened to me before with Akhlas. Basically, their consistency isn't right, or there's an air bubble, or a crack, or something just wrong with a coal and when you light it, they break apart into pieces sending sparks everywhere. The last one I had explode came apart into about five pieces and one flew at least 10 feet, nearly missing my friend and landing on the carpet.
If you still need further explanation, go to a local hole-in-the-wall smoke shop, buy a roll of the cheapest no name quicklights you can find, go home and light them all. You'll find a demonstration sooner or later.