Behind the scenes of the K-fee ad

It is an infamous screamer that tells you to find the ghost behind the zombie's hair (from the car commercial). But when the video reaches 0:16, Regan pops up with a scream. In then says "gotcha! Didn't I? Made for YouTube only". This video was made by user hypergames.

Links
NOTE : The following video contains a screamer.
 * youtube.com/watch?v=Ec89gxfLtT8