This morning I was listening to a Black Sabbath concert in Asbury Park (8/5/75), it's from a King Biscuit broadcast...when I noticed this section of music:
Link > Sabbath Improv
I immediately thought of the beginning of Everybody Wants Some. Remarkable coincidence? Who knows. Regardless, it's a cool track. This was part of Iommi's guitar feature during the song Sabbra Cadabra.