"Excuse my attempt at what was voted the greatest guitar riff of all time."
It was an extremely good attempt. I think most people would get it almost immediately. It is often said that in music the simple things are the best, and - a few exceptions aside - I agree. It is an iconic riff, and one of the great things about it is that it's so easy to play - most budding guitarists pick it up very quickly. It resounds from a million bedrooms every day.
I used to love the feature that Danny Baker ran on his Radio 5 show many years ago where people would send in recordings of machinery playing this riff.
Here's a video of some floppy drives - bet you can't listen to more than 30 seconds.
Many people don't realise that Smoke on the Water was written about a Frank Zappa concert at Montreux Casino that ended in the destruction of the venue after an idiot in the audience decided to fire a flare which set the stage curtains on fire. For my money Frank Zappa was the greatest rock band leader ever, not only was he a fine composer and guitarist, but he ensured he always had the best musicians in his band, musicians who were allowed to flourish and express themselves. Sadly missed.