AGP- Marine Helmet

Sarge took that as a no, but noticed Nubby's knife stuck between Gravis' helmet and gorget. Without waiting for a medical opinion, he seized the knife and twisted it with all his beefy-noncom strength.

Later it was explained to Sarge, but not Nubby, that the latches on Mark VII Power Armor helmets don't actually lock, and he could've just flipped them open. At the time though, Sarge was too busy to waste time thinking, and just tore apart several million thrones worth of data-relays and void-seals. When the helmet finally came off, with a tear and a snap rather than a little pop, Sarge ran over to where Aimy was beating seven kinds of shit out of Tink.