"Are you alright, miss?" you ask, extending a hand down to her.
She sits up and slaps your hand away, a wild spark dancing in her eyes. Lifting herself from the ground, she doesn't once blink or break eye contact, her blue eyes locked with yours. Slowly she backs away, and then disappears into the gathering of people.
Seeing that there is no act of violence to spectate, the gathered crowd begins to disperse with a murmur. Beside you, the rowdy youth shouts curses and spits on your boots. Before you can retaliate he, too, melts into the crowd.
Your good deed is done, but a niggling feeling remains. You know that you cannot shake it, and choose to act upon your instincts.