Push her off balance

"I simply do stretches every day" you answer, theatrically exercising one leg. Then you speed up, flashing across the square at a fast enough speed that you're a blur, but an onlooker could still narrowly spot your trajectory. Again, you kick up a little gust of wind, which sends the warrior-maiden's hair flying about, and pushes some of her clothes off the table.

You run past her, crouched and naked in the middle of the plaza and cluthing her breasts with both arms. You can see her form moving slowly, just too slow to lock her eyes on you passing by. As you pass her, you give her a little nudge with your hand against her shoulder. You don't put a lot of strength in it, but in the normal flow of time it translates into a lot more, and she tumbles over in slowmotion, landing on her stomach on the floor.

You drop back into the normal flow of time, watching the remainder of her falling over at normal speed. She's down on the gravel floor, face first, with her bare ass up in the air as she adjusts to push herself back up.