Whoo, that would suck
~The good~
The graphics were absolutely amazing! Not really sure why there was a vampire there, but it was still pretty cool. The sound was done very well, subtle music in the background and good biting sounds. The "trick" is also very well done, it was loud, surprising, and un-expected. It was pretty disgusting which also added to the violence.
~The bad~
Too short, maybe you should've added an actual game after the gag, because it really was well done.
Overall, a very nice gag, you should definetely put more of your stuff on newgrounds.
4/5