When I sat down he just stared at me. It was uncomfortable. (If I make eye contact at all with people on the train it's just a quick nod of acknowledgment and that's it.)
After he was done looking at me he stared out the window. I, too, looked out the window, thankful to be free of his eerie gaze only to see him staring at me in the reflection! At that point I think I peed myself a little.
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At one of the stops a girl about our age came and sat next to him. She was frail looking, as if she'd been battling some disease her whole life and would break in half if she tripped.
Our friend the psycho stared at her with unblinking eyes, looking her up and down a couple of times before lifting his hand and sucking on his wound again.
Extremely creepy.
Nothing ever came of it. I haven't seen the guy since, thankfully. But come to think of it, I haven't seen the frail girl either...