How many times does it have to be explained to you? It was trains that brought the towers down
Nicholas Borrillo -- Firefighter (F.D.N.Y.) on 23rd floor of North Tower:
Then we heard a rumble. We heard it and we felt the whole building shake. It was like being on a train, being in an earthquake. A train is more like it, because with the train you hear the rumbling, and it kind of like moved you around in the hall.
Paul Curran -- Fire Patrolman (F.D.N.Y.) North Tower:
I went back and stood right in front of Eight World Trade Center right by the customs house, and the north tower was set right next to it. Not that much time went by, and all of a sudden the ground just started shaking. It felt like a train was running under my feet.
Joseph Fortis -- E.M.T. (E.M.S.) T]he ground started shaking like a train was coming. You looked up, and I guess -- I don't know, it was one that came down first or two? Which one?
Keith Murphy -- (F.D.N.Y.) [Engine 47] At the time, I would have said they sounded like bombs, but it was boom boom boom and then the lights all go out. I hear someone say oh, s___, that was just for the lights out. I would say about 3, 4 seconds, all of a sudden this tremendous roar. It sounded like being in a tunnel with the train coming at you.
Timothy Julian -- Firefighter (F.D.N.Y.) [Ladder 118] You know, and I just heard like an explosion and then cracking type of noise, and then it sounded like a freight train, rumbling and picking up speed, and I remember I looked up, and I saw it coming down.