Whatever you want, man. Personally, I'd make sure that they don't pass out and if they do put them in the recovery position. Nobody's ever died from hyperventilating, at least not without some other disease or chronic medical condition that complicates it. I'm just freaking the fuck out a little more because I realized how real this might not be, and you kind of broke my reality with the "We're not from this world either!" schtick.