The best interview I ever had was at Amazon. I was on fire. They offered me a job on the spot, cutting the whole process in half. I turned them down because my drunken Ukrainian roommate insisted that "Intel was the future". Anyways... they (Amazon) found a childhood friend of my advisor, and had that childhood friend call my advisor to tell me I was making a bad life choice. Mind you, I'm in the U.S., and my advisor grew up in Finland. Finland.