The closet scare, I seem to have missed that there were a specific scare which includes a closet... well, on a side note I'd like to recommend that you avoid using these types of overused scares and go for a little more creative aproach to scaring players in your custom story.
If you really want to use this scare then I suppose you should try and use prop force on the closet and add a path node so the monster walks out from inside the closet and then you tick that little box when you select the monster in the editor that makes the monster turn into a lovely, unrealistic cloud of smoke, hallucination something I do belive it is called. And since you don't know how to write a script may I highly recommend this tutorial:
#mce_temp_url#