Ozzy's guitar-player Gus G is touring with former Megadeth shredder Marty Friedman on the Guitar Universe 2014 tour.

Here, they on the first night (Thursday night) rock one of the heaviest songs Black Sabbath ever recorded, "Symptom of the Universe" together!

This has always been one of my favorite Sabbath songs, and to hear these amazing players on it is awesome.  U

Unfortunately, you can't hear much of Marty's solos. Also, there's another shredder off camera that we don't get to see until the end.

But it still kicks ass.