The band members of Spinal Tap always talked about “the fine line between stupid and clever,” and that’s about all we can think of while watching this latest Ice Bucket Challenge video produced by chemist Muhammad Qureshi, who decided to one-up everyone else who has taken the challenge so far by pouring liquid nitrogen all over his head. FROM EARLIER: Stephen Hawking delivers the most heartwarming Ice Bucket Challenge video yet For those of you who don’t know your science, nitrogen has to be very cold before it becomes a liquid — it has a boiling point of −321 °F and a freezing point of −346 °F, so any liquid nitrogen you encounter will be within that temperature range. Because Qureshi knows what he’s doing, however, he