Insanely hot. Just dip the tip of a toothpick into this stuff, then mix it into your chili or whatever and enjoy real heat.
If you drop the bottle you're supposed to call Hazmat to come clean it up. This company offers hotter sauces but I don't advise trying them.
Just in case anyone is brave enough to try it.
http://www.hotsauceworld.com/dabomb.html
Da' Bomb! - Beyond Insanity: Hot sauce and chili sauce specialists
Da Bomb Beyond Insanity - InsaneChicken Hot Sauce Store