I got out class that day, got into my car, and at some point during the commute to work I turned on the radio (local station, WAAF) and the female DJ was saying something about plane/planes hitting the Pentagon and I thought "This is a strange parody. Don't really know if I get this joke." I listened for a little while longer and they were exclusively talking about the World Trade Center towers and all that (and this being a rock station, I knew it was no joke seeing as no music was being played and they were deadly serious,) it seemed too unbelievable to be true. By the time I got to work everyone - employees and customers alike - were just planted in front of this little TV we had on the floor, listening and watching the coverage and staring at the footage of the plane crashing into the second tower that seemed to be playing on an endless loop.
I remember that for days and days that was all that was on TV.... it was constant and nearly universal coverage. Insane.