I worked second shift and was home with my young children. I remember listening to WGR and them mentioning a plane hitting one of the towers, but didn't think a lot of it, assuming from the way they were saying that it, it was a small plane that hit. Then the reports of a commercial plane hitting it so I rushed to turn on the TV. I called my wife at work and was describing to her what was happening. It was surreal.
Also, want to add that I lived right by the Buffalo airport and was used to hearing planes takeoff and land all the time. With all flights grounded for several days (maybe a week or so?) the silence was eerie not to hear that.