I don't get how herds work: suddenly everyone, everywhere is talking about four stroke ruffs. They happen to be all over this piece, played in 16th note triplet form on the snare drum, and especially played down the drums, ending on the bass drum— a very popular lick around 1970. Ian Paice, the drummer here, didn't invent it, but he plays them so much I've started calling them Ian Paice Specials. What the hell, maybe it will stick. Why not?
This performance is an early favorite of mine, from about when I was in the 8th grade, ten-ish years after the record, Burn, by Deep Purple came out:
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Audio after the break: