To bring demons back from the dead is tricky business, and what you need to do is get some candles, a blanket, and a book of spells. Also, possibly some snacks in case you do bring those demons into the living world, because they're going to be hungry, and you don't want them to eat you, do you? And where you need to go is a graveyard, and you have to go at night. Also, bring a friend, because dying alone is horrible, if it comes to that.
But this is After Effects, and you won't really need any of that stuff to bring demons into this world (except, maybe just the snacks). Andrew Kramer shows you his trick to creating a demon face warp effect in Adobe After Effects, using reverse motion tracking while liquefying and texturing skin and shadows. You can turn any living person into a demonic spirit with this cool effect… you don't have to kill them first!