It's a little strange to hear a chemist refer to a compound as "angry" or "vicious," much less "evil." But after seeing how manganese heptoxide reacts to everything, I can see that the adjective "volatile" doesn't quite do the job. Wikipedia says that manganese heptoxide is "more often discussed than intentionally prepared." YouTuber styropyro (Drake Anthony) mixes some up to show us why. This chemical hates everything. Even heat. Well, except for glass or ceramic, since otherwise you wouldn't have a container to make it in. No wonder he calls it a "demon molecule"! -via Digg
Update: It appears that Drake has been suspended from YouTube. He explains in a video in the comments below. So instead of the original video, here is a short clip from Instagram, in which he mixes up manganese heptoxide on a wood block.