That's how I feel about my project about the 'Metaphysics of Nothingness' right now. I'm sure Heidegger was brilliant but the more I read the more I'm sure he was insane too, but still I'm sure he's on to something and it really is incredible interesting...I've wondered about those references to the "Call of Beyng" myself.
To you concerned souls out there, no I'm not getting more insane than I ever was. I was just reminded of some of those Cthulhu-stories and so that idea wouldn't interfere with the rest of my evening of working, I thought it better to get it out of my system.