She grabs for her skirt

Fear makes people act in strange ways. Fighting back a scream, Supergirl bends over to grab at her skirt, without even thinking of the consequences.

Her cape flaps about and Captain America is treated with a great view of her naked round arse, bending over, snapping off another couple of photos.

Realisation dawns on her and Supergirl grabs her skirt, wanting to cover up, but also wanting to check the damage.