I remember exactly where I was too. I was getting ready to head to my High School and it was on tv. Couldn't believe it was real, except it was on every channel. I didn't see the planes hit but did see them collapse. I believe I missed first period, got to school and some people still didn't know or believe, while others were just devastated.
It's interesting and sad to me though that this is my Pearl Harbor... in that, while I'll never forget, my kids and younger people will actually never truly know or understand.
Maybe much how, while I understand Pearl Harbor was probably the greatest tragedy prior to this, but for me I don't understand how much it probably affected the country, or even the world. But I do with 9/11.