At the start of the battle? Unlikely they were walking around with jetpacks so they will do athletic stuff after trying to fight it on ground level for a little bit with guns. Some super talented sword wielding woman made it up and would have won but as she leaps to deliver the ending blow, the tentacle face shift takes her off guard and devours her before her magical slice of doom would have connected. And maybe she dislikes gross things so that throws off her attack too. XD She gets grossed out for just a second too long.