I put together a really quick animatic to get a feeling for the timing. This only features the first two scene which have been altered slightly since I made this as well.
As I work on the ending to the last prank and the last scene, here are the Storyboard cells thus far. Once the story in more final I'll create more refined digital cells to take forward into an animatic. The key changes you might notice are the reactions and responses to the pranks. These alterations help the characters' development, build up the tension and also make it a little more funny.
The Second Draft of the Script