I haven't seen the film you mentioned I'm afraid.There must be loads of films more disturbing than
Beyond the Darkness, it's just the ideas in the film I find a bit sick.Some of the FX aren't bad either, especially the gutting of the dead girlfriend and the scene where young Frank extracts her brains through tubes inserted in her nose.The acid bath and crematorium scenes are quite nasty too.It's certainly my favourite flick from D'Amato.