The following video contains graphic content depicting the dangers of crystal meth.  Some may find it over the top or melodramatic; however, if you have ever dealt with anyone who uses/abuses meth (commonly called "tweakers" by EMS, other public safety, etc.), then you know these individuals are typically out of control and that is putting it mildly.

http://www.youtube.com/watch?v=bqfyt7E58iU

Reference:

Zeug, S. (July 28, 2012). Crystal meth - Not even once. Retrieved from http://www.youtube.com/watch?v=bqfyt7E58iU