Being a huge fan of Japanese movies, I've seen my fair share:
1. From an action movie of unknown name: Having sliced your enemy's stomach open, complete with intestines spilling, he then proceeds to grab them, stretch them out of his own chest and strangle you to death with them.
2. From Tokyo Gore Police: OH man, where do I begin? Well, first there was the bit where the cop gets a working chainsaw thrown in his mouth, then there was that pimp being stabbed with pipes that led to her mouth, so as she died from blood-loss, she also drowned on her own blood, and there was that whole bit of the guy being executed via a Nintendo Wii.....
3. Anything in the SAW movies.
4. L from the Death Note anime. Seriously, you finally pinpoint who the mysterious KIRA is, and that he's standing right next to you, and what happens? You suddenly die, thanks to a meddling Shinigami!