The most dangerous madmen are those created by religion, and. . . people whose aim is to disrupt society always know how to make good use of them on occasion.
For instance, the blood of hibernating arctic squirrels may supercool to minus 3 degrees, when it would normally congeal. The supercooled blood still flows, since it remains a liquid, but the slightest disturbance will cause it to freeze, killing the squirrel; therefore, you should not disturb hibernating arctic squirrels.