You can tell it's a Canadian riot because people cleaned up afterward and it involved performance art.
Oh, look - The Hun found a local angle.
Initially I thought the couple were involved in a play on the Beatles song title above; specifically the frequent expropriation of the "it" there to refer to street protests (not McCartney's intention - according to The Pede it was about a couple of randy monkeys.) But that's probably just me overthinking things again.