Google put on a pretty historical performance today, as far as Internet company keynotes go. Co-founder Sergey Brin interrupted a Google+ presentation from Google’s Vic Gundotra to talk about Project Glassa and reveal the first Google+ Hangout from the device.

This was no ordinary hangout, however. It involved hanging out with some skydivers who participated while jumping out of a blimp, and all the way down. The bit then transitioned to some extreme biking, and wall climbing, before all players converged back in the keynote room.

We posted a bunch of screen caps from he presentation here, but Google als made a demo video available, providing a look at the rehearsal:

More Google I/O coverage here.