When Jobs was showing off the iPhone 4's new Retina display, there were some technical issues due to the number of people in the hall using mobile Wi-Fi hotspots. It was a slightly embarrassing -- and awkward -- moment for Jobs, but as you can see from the keynote stream, no editing of said moment was done, and you can replay the awkwardness in all its glory.
As of the time of this writing, the keynote is not yet available in the Apple Keynotes Podcast series on iTunes, but it should be added shortly. Update: It's there now.
Apple iPhone 4