Have you ever looked up old classmates on Facebook?  Or better yet,  maybe you run into them unexpectedly after several years.   It's nice to see how successful many of them have become.  But occasionally, you learn that some classmates have struggled through some difficult problems.   The guy we're about to introduce you to , however, never solved his problems.  In fact, he created nightmares for a number of people.  Monstrous nightmares.