Do people actually find that usable? It definitely made me think the page was broken at first... The slideshow seems like a 'play' (right-arrow) much more than a 'scroll' (down-arrow).
Is this a metaphor for Dyson vacuums in general? (Technically-clever, shiny, but not necessarily the most effective)
With clicking it works fine. But some don't really like scrolling via touch.
And best of all, the "shop" link takes you to a shop where you can't buy it...
Why did you think it was broken? It said 'scroll to begin' on my screen so I suppose I knew I was expecting something when I scrolled.
The recent NYTimes article about ISIS in the Tigris and Euphrates rivers ( http://www.nytimes.com/interactive/2014/07/03/world/middleea... ) is a much better treatment of the scroll.
If I'm going to be subjected to lengthy animations between slides, I generally expect arrows left-and-right to click on.
The whole 'scroll to begin' language on an otherwise beautiful page is a usability smell. See http://www.harmoni.ca/blog/affordances