One of the most impressive things about this year's Google I/O so far, or at least the most spectacular, has been the Project Glass demo in which Google had a device carried by skydivers jumping from a blimp and landing on the conference center's roof.
From there it was carried by bikers, people rappelling down the side of the building, and so on, until it reached the stage. If you think it was probably tough to pull off, you have no idea. Google had prepared for this for weeks and even had the FAA change
regulations so that people could jump out of a blimp.
Prior to the jump, the FAA ruled that doors on the blimp had to stay shut during flight, a sensible rule. But this would not work for skydiving, so it had to be changed. In fact, the jump was the first ever legal dive from a zeppelin in the US.