Strange encounter on the Piccadilly Line - am I overreacting?

This happened on Tuesday evening (8 October) around 6:15 PM. I was on the Piccadilly Line heading home from work, usual commute, nothing weird about it. Train was fairly full but not packed. Got on at South Ealing, heading towards Acton Town.

Around King Street, I noticed an older gentleman in the carriage - probably 70s, wearing a grey overcoat that looked like it was from the 1950s or 60s. Kept staring at my hands. Not in a creepy way exactly, more like intensely focused on them. I thought maybe I had something on my hands so I checked, nothing there.

He got off at Turnham Green and as he left, he looked directly at me and said 'You'll know when it happens' then just... left. Train pulled away and I felt genuinely cold, which doesn't make sense on a crowded train. My mate says I'm being paranoid and he was probably just a confused old man, but something about it felt off. Has anyone experienced something like this? The specificity of 'you'll know when it happens' is what's stuck with me.

This is either nothing or classic cryptic spirit/entity interaction. Could be a warning, could be a test, could be complete coincidence. The fact that you remember it vividly and it still bothers you is probably worth noting. Has anything happened since? Any unusual occurrences? Or was it just an odd interaction that stuck with you?

Mate's right though - you probably did just encounter a confused old man. London's got millions of people, loads of them eccentric, most of them harmless. The intensity you remember could be more about how your brain processed it than anything actually unusual. Unless something weird actually happens because of it, I'd let it go.

Keep a record anyway. Write down the date, time, description, exactly what he said, how you felt. If this is paranormal precognition territory then other stuff will probably follow. If it's nothing, at least you've documented it and can look back and feel silly later. Either way you have a baseline.

This happens so often on the Tube though - people say cryptic stuff in passing and our brains assign meaning to it because humans are pattern-seeking. He probably says something like that to random people regularly. It's only memorable because you're on a paranormal forum and already primed to notice weird things. Not everything is a sign.