Bat signal seen over London (4 images)
Batman's iconic 'Bat Signal' was spotted above London last night as the first Batman drone was launched. Commuters were astonished to see the Batman emblem projected onto the night sky. The stunt marked the launch of a brand new Batwing drone which resembles the iconic Batman symbol and can 'swoop, roll and fly through the sky like the Dark Knight himself'. The black drone can fly at 30mph and features a built-in HD camera. Video and pictures can be streamed through smartphones...