Climbing inside, Marcel and his three friends lit their oil lamp, raised it to the roof and found themselves surrounded by one of the artistic wonders of the world.
Although each step produces only enough electricity to keep an LED-powered street lamplit for 30 seconds, Kemball-Cook says that the tiles are a real-world "crowdsourcing" application, harnessing small contributions from a large number of individuals.
Projects in Egypt include a high-tech reimagining of a "fanuz, " the colourful lamp traditionally lit during Ramadan -- a home-grown response to the loss of the fanuz-manufacturing industry to China.
Jonathan Dickinson, prosecuting, said Khosravi rested his iPad on a windowsill, lit the room with a halogen lamp and deliberately recorded the assault.
The glow of Mombasa fades into the night behind us as our train clatters past derelict signal boxes and a decaying station lit by the feeble light of a paraffin lamp.