The one on Hammersmith is about a guy who is scared of Hammersmith London Underground Station. Not just a particular part of it but "just the main part, where the District and Piccadilly Lines go through. I can't go there..."
Maybe he was scared by Shane Ritchie leaping out of the Minder poster there!
It's a funny five minutes, mainly because I'm fairly familiar with Hammersmith station as, it's my daily interchange station. Although I'm sure that phobia of the Tube isn't great.
My ex-husband used to be really scared of being in the underground part of the Tube. When we started dated, it's a pretty weird thing to have to tell someone and I thought he was joking. But he got often got panic attacks underground and I could feel him shaking & sweating, particularly when the trains ever stopped between stops (which they appear to do fairly often when you're scared of them).
He got over this after a while, but we had to make a number of convoluted trips and get off the Tube early & continue our journey by bus, when things got really bad. I'm not sure exactly how he got over it. It was probably eventually, him getting a job, which meant he had to use the Tube everyday. However, the time when the Underground was his personal Room 101, wasn't a pleasant memory for him.
When I was very young, I had a massive fear of escalators (not just Tube escalators). I thought my feet would get eaten by them and I had to physically dragged up Tube ones whenever we came into central London. Thankfully I'm over it now, but I bet there are a lot of people around guarding secret phobias of the Tube or parts of it. Perhaps you're one of them or know someone who is?