Killing Your Main Characters

What if your characters heard you writing about them? My mom said that I had to watch this movie, because I would find it appropriate. You have to be in the mood to watch it, its not Elf, but I found this particular scene so hilarious, I just had to share it! Now Harold is a character in a book, and a literature professor is telling him that he has to die or the novel will be ruined. Now they are totally straight faced here, and I don't know how they could even get through filming this scene so straight-faced, I was rolling on the floor laughing--because, well--he's a character! I feel sad now for all the characters I have killed and continue to kill in my stories. LOL!