The Crazy Finsbury Park Lady

Last week I heard a commotion through my earphones whilst waiting on the northbound victoria line platform at Finsbury Park. I looked around to see what was going on and turned off my music. A group of Jamaican women were standing around a pram, and one was screaming and shouting at the others whilst they laughed at her. Her accent was so thick that I couldn't work out what she was so agitated about.
People on the platform were looking at each other in that British way when someone is making a bit of a show.
I looked away but then a movement caught my eye: the woman was taking her top off!
She threw her top onto the floor and shouted some more in her bra.
Just when the rest of us witnessing this thinking this was the strangest thing we'd seen on a tube platform, she started taking off her shorts, except this time she threw them onto the track instead of just the floor. Blimey! Now the woman was shouting and screaming at her cackling friends in just her bra, tiny thong, and sandals. She ran around the pram a few times before taking off her bra as well. Unfortunately she had those breasts that look a bit like Snoopy's ears..you know the ones, long and flat with a little retrousse rise at the bottom. Not the most scintillating of sights on a sticky London afternoon.
The woman went off for a jog about the adjacent platform. She of course ended up deciding to stand next to me. Being very polite and ever so English, I just pretended I was reading my paper and that a woman standing next to me in just a thong and sandals with her wangers flapping about was just your standard every day occurrence. I tend to attract nutters in this way and have adopted a policy of least resistance, or perhaps a policy of imagining I am wearing an invisibility cloak (doesn't work very often, I am one for getting stuck in conversation with strangelings).
Her friends, trying to contain themselves- or maybe just trying not to wet themselves with the apparent hilarity of it all, collected up her remaining items of clothing, and brought them over to her. She put them back on, got on the tube that arrived and sat down, sans-shorts, and pulled a little girl, looking about 18months old, onto her lap.