Remove some of her plate armor

You transition into superspeed and easily dodge the blow of her sword. Then you set to work, unbuckling all the plate armor on her limbs, and neatly stacking them on the table where you had been sitting. Then you allow time to resume.

The knight's strike hits nothing but air. She turns around, trying to locate you, but the same time she spots you she notices all the plate armour along her arms and legs is missing. Any confidence she still had appeared to evaporate on the spot as she realizes what was happening.