Sergey Brin appeared suddenly at Google+ presentation (by Vic) and interrupted him to bring some excitement on the first day of Google I/O. He is actually having a Google Hangout with Skydivers in the air using the Google Glass. Finally, the video is available for viewing. BTW, I actually posted another skydiving video earlier but this is the LIVE version.
Here is the 11 minutes of excitement at Google I/O. BTW, the price of this Google Glass is not cheap.