v0RTEX Anomaly.

Nitrogen triiodide is a highly unstable substance that detonates when disturbed. So we disturbed it.

Nitrogen triiodide is so unstable that even something like a mosquito landing on it can set it off. Three iodine atoms cluster around one side of a nitrogen atom. Being crowded around one end causes something called bond strain as the atoms repel each other in a small space. The result is that the molecule is prone to falling apart, explosively.  

Watch the full video, and let us know if you can explain the flash of light before the explosion, here.