What Is Literally Happening

I have no idea what is happening here but I feel like there are no good answers.

Extremely aggressive tactical crotch attack?

Biting her lip because of how much it hurts that her chest-plate apparently melted onto her breasts?

Letting out the world's most powerful fart?

Okay, maybe there are actually some great answers.

(Cover of Threshold: Allure #0, Boundless Comics)