"Joining the Dots" by Cleary Connolly
The human body can be reduced to 13 moving points on the head, shoulders, elbows, wrists, hips, knees and ankles. While still, the patterns were abstract. But once in motion, actions portrayed by the dots (swimming, dancing, walking, running) become easy to guess.
What were these two people guessing?
IFO (Identified Flying Object) can be seen in the background, as well as King's Cross station.