Requiem for a Dream (Darren Aronofsky, which reminds me I still need to see Black Swan).

When I first saw this I thought that this would forever be the most depressing thing everyone should see. Should in the sense that if you want to keep your kids off drugs make them watch this--although it is a completely inappropriate movie for kids under 17 by any standards as per our rating system. It's a great film; you really like the characters and hope all their dreams and ambitions come true...but it doesn't. You feel the lure of their highs as you watch them destruct. Make sure you get the unrated, NC-17 cut as that is the original with the harsher ending. The R version was released on video only. Still the most depressing thing I've seen...and would recommend.