Google Project Manager interview questions

I applied through a friend who is at Google. I heard back to setup a phone interview a week later. I set my phone interview for a week and a half after that. After my interview was over, I did not have a good feeling about the phone interview. I don't want to go into details, but let's just say I could tell the interviewer didn't seem interested in seeing me succeed. His first question was very ambiguous - nothing like I had read about here or heard about - and ended up being an estimation question. And he tended to ramble which didn't help me get to the point of the question. After every answer I gave, he pretty much implied I was wrong and made me use his assumptions to continue to answer the next part of the question. He didn't give me a chance to justify my responses (as I'm told they are supposed to do), and cut me off exactly at 45 minutes. I feel like it's luck of the draw with the initial interview. You have one chance to impress one person. While my experience wasn't necessarily positive, I don't fault the company as a whole and I'd encourage others to apply to this position.