You have to be fast. Soon we noticed that while Pyongyang is meant to be a utopian showcase for foreign visitors like ourselves, there are more glamorous bits, and there are less glamourous bits.
What's more, our mute driver was perfectly aware of this, so he would conveniently slow down whenever the surroundings were impressive, and speed up whenever they were less pleasant, to make them more difficult to photograph. One of us said that taking photos in North Korea was therefore like Olympic archery.