About 10 years ago, there was an older woman on the Red Line who would sing what sounded to me like sea chanteys. She was tiny and blonde (dyed, I'm pretty sure), usually wearing red, and she'd sit with her legs crossed and bounce her leg forcefully while she sang.
When she had finished her song, she would open up her hand to a "shake hands" position and bite the flesh of the V between the thumb and index finger.
I mentioned her to a friend one day and she said, "Oh, her! I switch cars when I see her!"
Wonder if she's still around. And I wonder what the hell it was she was singing.