Watching that reminded me of the way everyone used to ride bikes years ago. When I was a small boy I lived a few hundred yards from the entrance to the Martin Baker ejection seat factory. A few minutes after the hooter sounded to announce the end of the day shift, hundreds of people on bikes would come streaming out of the factory gates and down our road, like a horde of locusts.
Don't know if it was the same in other parts of the world, but here pretty much everyone rode bikes to work in the 1950's and early 60's, as cars were expensive and fuel (along with food and other luxury goods) was still rationed here for around ten years or so after the war.