I was working not far from Madison Square Garden at the time. Newly married.
3 workmates of mine were on the roof that morning drinking coffee on a coding break and we saw the first plant hit the towers. We freaked the hell out and had no idea what was going.
We stayed there watching it and a while later the second plane hit. My friend was like omg somethings up and was like let's get outta here (she lived 2 blocks from me and we took the same train).
We hurried to the train station and got on the PATH train into Jersey City. Midway through power went out and we were stuck in a tunnel for what seemed like forever.
The weeks that followed were horrible because every sound and flash seemed like another attack