I really enjoyed this 2 1/2 minute ONA. On the surface, before watching it I thought it was going to be ridiculous Ninja Slayer from Animation level bad but ironically funny. My initial impressions were entirely wrong.
Despite looking like it was created using PS1 graphics by a brain damaged monkey. I was surprised and found that despite having no dialogue, much sound or any text that a lot of the story, plot and lot development was conveyed in a intellectually ambiguous manner.
AND this is only a 2 1/2 minute ONA mind you. But it's dense and a lot of why the characters are doing
what they are doing can be gleaned by careful analysis.
IMHO this goes beyond any inherent shock value of a horror anime it's art DAMMIT! It's deep and meaningful!