There's a famous Jack Chambers landscape in the AGO showing an overpass over the 401, Ontario's biggest and busiest highway. It is an oddly shocking painting. Not because there is anything shocking about highway overpasses, of course - they are banal enough objects. But that banality rendered in gleaming oil paint with Canaletto-like attention to detail is calculated to make you rethink your ideas about landscape.

Well, this picture by Tarragon is neither detailed nor an oil painting. What is interesting about it is that he made it - on an iPad - in those fleeting seconds as the overpass approached at 100 kph. Which is another way to rethink our ideas about landscape paintings.