Seriously, it's like watching a horror movie. You know it's gonna happen, you don't want it to, but the suspense is there.
Let me set the stage...
You're walking down a dark hallway, just ambient enough to see a couple feet in front of you, passing doorways, the suspenseful music is setting in, each doorway something could've jumped at you, you even peer at a couple. Finally the music stops suddenly as you reach the end of the hallway just before you can see around it...
The question is, is it gonna be a friendly figure who pops out in front and you were scared for nothing? Or is it gonna be the monster that comes to eat you?
What's even better? Is if the friendly figure is the one you see, then the monster appears behind you and swallows you whole (the inevitable bugs)...