I elbowed an older lady on her hip.

I was sitting on a crowded train. A woman boarded and proceeded to the back aggressively and sideswiping passengers, both standing and sitting. A few of them gave her cold looks.

I'm thinking: "If she pulls that on me, I got something for her".
She approached, and sure enough, she swiped me, and almost simultaneously I gave a her a hard shot to the hip, deceptively and played it off by scrolling through my phone.

I saw her staring at me out the corner of my eye, but she proceeded to the back. It felt satisfying. Taught that bish a lesson.