One skill of Parvati was that she had quick reflexes and was able to think clearly and calmly in dire situations. Her knees hadn't even hit the blanket before she knew they were surrounded. It was better to get this over quickly.
Hand quickly flying over her wand, she hit the ground. It was her duty to do nothing, and to let the Aurors do their job. A stinging sensation that ran from her neck to her upper back made her think she had hit the ground a little too hard. Or so she thought.