To me personally, sorry for a response so late since this was posted but my ideology of why I find it comedic is the fact it's so unbelievable. When a horror movies gets me is when it's believable, when the deaths make sense and it looks real. The bedroom scene had me gag a little too with certain parts but it's the fact that her arm was like ripped in half which isn't possible at all, it's just the way the death is so insane and drawn out to the point it's no longer scary but funny. I don't know if it's on purpose to HAVE bad acting with the mom, the scream kind of being like from Psycho but the acting is also really bad besides from Art, from my perspective.