Sure, this shot is probably partly important because it's a flashback (presumably) to a time when Jessica was completely controlled by Kilgrave. We've already seen her punch the air with him by her side and heard his voice in her head encouraging her to do terrible things. But this shot is mainly important because she slams a damn axe into a concrete floor and the concrete flies everywhere and it just looks really damn cool. In a trailer complete with explosions and Jones yanking a padlock off a chain like it's nothing, the site of her destroying a floor might still rank as the most stunning display of her strength.