OK, true story from grad school. I actually witness someone mess up boiling water...twice! Had a roommate who was going to prepare pasta or something, put the pot with water on the burner, and went back to his room. Something like 20 minutes later he runs out, the pot is dry as a bone with no water left, and hot as hell. So he curses, puts more water in and...you guessed it, went back to his room again and the same thing happened! Now...in his defense (somewhat), he had some exams coming up and was highly distracted and busy. But it was still damned funny, he never really lived it down (and it was *my* damn pot he nearly ruined, too!).