Ray Domanico: My morning’s brief commute on the Lexington Avenue subway to Grand Central was punctuated by the sudden appearance of a madman thrashing about, speaking in tongues, and spewing bodily fluids in his path. The riders between me and him rushed past me, or tried to, to get to the far end of the car. He tackled one young man and threw him to the bench. Others were caught up in his fury as well. I took a few of his hits to my chest, though the blessing of a winter coat dulled the blows. Finally, his end of the car emptied, and all passengers were packed tightly in the other end, some standing on benches to keep an eye on what was going on.