First post here. Getting back into guitar after 20 years and loving it. Relearning a bunch of classic Black Sabbath tunes, but there is one 3-note section in Paranoid (an otherwise easy song) that's driving me nuts.

It a variation to the 12-14 | 10-12 | 10-12 (5th-4th strings) | 10-12 | 12-14 main riff in the original track. None of the tabs I've seen show the variation, and none of the "How to play Paranoid" videos on YouTube that I've seen explain it.

But the guy in this video completely nails it at 1:11 - 1:12. Can anyone explain what he's doing here? It's driving me bonkers and I gotta know!