I think the birdman you drew is more terrifying than the nether.
Dem pointy lips.
Good animation slightly non-grating sounds, if you were going for the horror genre, then 5/5 on the horror aspect. It has potential...just don't draw the guy with pointy lips; it's creepier than the ant with tits from Weebl's Puppy Robot video >O)___(O<
3/5