I saw a bunch of these running around Paris last weekend as I sat at cafes revising my thesis (no joke, that’s really what I did while in Paris). I immediately took to them because of I saw their anomalous status within the usual two-wheeled/four-wheeled world of transport. Since most of my research is about analysing anomalies in classification systems, I was amused to see this piece on the BBC about how you don’t actually need a license to use one.