Amazon Software Engineer interview questions

First, I had an hour long phone interview with one of the companys' HR specialists. We talked about my qualifications and experience. This wasn't too bad. A week later they invited me to a technical interview over the internet using collabedit service. It was my first time doing it online. The interviewer quickly jumped to a programming task for which I had half an hour. I was also supposed to comment aloud to a phone as I type. It felt awkward, someone watching as you type, and made me extremely uncomfortable. I didn't have a ready solution to the problem and while thinking about the problem there were long periods of silence. The interviewer would interrupt, possibly trying to be helpful, but instead it felt as being rushed. At the end we run out of time to fully complete all the tasks.