During the morning rush hour subway, people are pressed against each other.

A guy accidentally brushes against a girl.
The girl turns around and glares at him: "Only three bones in your body? Not even one is stable?"
The surrounding area instantly falls silent.
The guy holds back for three seconds, staring at her lips:
"You have a mouth on you, dedicated to balancing, right?"
Someone in the carriage laughs out loud.
The girl doesn't say anything else.
When the train reaches the station, before getting off, the guy turns back and adds:
"Next time, remember, no matter how many bones you have, you can't beat your ability to find a fulcrum."
The doors close.