Earlier today at the keynote for its developers conference, Google demonstrated its forthcoming Google Glass technology by having four guys wear the glasses and jump from a blimp, skydiving down to the Moscone Center where the conference was taking place down below, all while broadcasting live to the audience via a Google+ hangout.

Here's the video of the hangout, followed by footage from someone who caught sight of the spectacle from the ground:

And from the ground: