Something absolutely mental happened on the Northern Line last Tuesday

Right, I need to get this down somewhere before I start doubting myself. Tuesday evening, about 6:15pm, I'm on the Northern Line heading southbound from Tottenham Court Road. The carriage was pretty packed - rush hour, innit - but I remember thinking how quiet everyone was being. Like, unaturally quiet.

I looked up from my mobile and noticed this bloke in a long grey coat standing by the doors. Nothing weird about that normally, except... I couldn't see his reflection in the darkened window next to him. I'm not joking. I stared for a solid minute, watching other people's reflections, but not his. When the train hit the tunnel between stations, the lights flickered and he was gone. Just vanished. The doors hadn't opened.

My mate thinks I'm having a breakdown. My mum thinks I need more sleep. But I've been on that line three times a week for five years and I've never felt anything like that before. Anyone else experienced something similar on the London Underground?

Mate, the Underground is absolutely rammed with weird stuff. I worked down there for British Transport Police for 8 years and you wouldn't believe what gets reported that never makes the news. There are entire sections of the old abandoned stations that staff won't go into alone. The fact you noticed the reflection thing is actually quite telling - most people miss the details because they're scared or in shock.

Could've been a trick of the light? The Northern Line lighting is notoriously dodgy, especially between stations. Reflections get weird when you've got fluorescent tube failures. Science explains everything, mate. Not trying to be a dick about it, just saying before you go full conspiracy, rule out the mundane stuff first.

The doors hadn't opened.

This gave me actual chills. That's not a reflection issue. That's someone or something that shouldn't have been there. I've got a theory about tulpas manifesting in high-stress urban environments but I'll save that for another thread. Did you feel cold at any point? Or a smell?

This is brilliant. Absolutely brilliant. Did his coat have any buckles or chains? Was he wearing Victorian-era clothing? Because you've just described something that matches about 40 Spring-heeled Jack sightings from the last 20 years. They're not just historical - they're active. And London Underground is basically a tunnel network connecting to their dimension or whatever. Proper fascinating stuff.