I was a little more adjusted because I'd spun Paranoid a couple times by then, but holy cow, that opening riff. Like you said, my face must've been priceless. The rain and church bell were unsettling as it was, then he pounds out the first chord of that flatted fifth devil's tritone, and I just about shit myself. I was frozen, then Ozzy's startling unorthodox howls and Bill's tribal drumming burst through, it was legitimately terrorizing. I actually had to stop the needle after the first song had played to humanly process what I'd just encountered. It took me about a week before I had the balls to put it on again and listen all the way through.