Korean horror movies never fail to entertain me.
Tell Me Something (텔미썸딩) is one such movie. The end part (where the plot took a great turn) was hilarious! Most amusing of all was the look on detective Cho's face when he compared the corpse exhibit with the painting, and realised things weren't the way they seemed. *Rotfl*
The moral of the story is pretty much similar to the one in Japanese movie Audition (オーディション), which is, one should always think with the right head!
I'm going to bed now, but there's no need to worry for me. I seldom dream about movies that I've watched just before going to sleep, and even when I do, I always dream about chasing after the villains or ghosts. :P