Block his path

You block his path with your body.

“Move aside lady I don’t want to hurt you!”

“Not going to happen”you reply

He goes to push you aside but are ready for this and send a kick straight up in to his crotch. He fumbles backwards down a few steps clutching his balls.

“Fucking bitch! That’s it your going to get it!”

He runs back up the stairs pinning you against the wall hard.