Considering how much you hear about drones these days, it's surprising we haven't seen more marketing stunts using remote-controlled hoverbots. But Paramount Pictures pulled off an interesting trick this weekend by using glowing quadrotors to create a Star Trek logo over London. The promotion, for the franchise's latest film, Star Trek Into Darkness, was timed to mark the end of the World Wildlife Fund's annual Earth Hour, which encourages cities to turn off nonessential lights for environmental awareness. As the hour of darkness ended, the 30 drones' LED lights (charged through renewable energy sources) turned on to form the insignia of Star Trek's Starfleet. Created by Ars Electonica Futurelab and Ascending Technologies, the result is pretty impressive—when viewed from the right angle, at least. Check out a video below, and enjoy the moment at 1:20 when two of the drones at the bottom of the frame seem to collide, sending one plummeting out of the sky.