Ok I couldn't sleep last night, my mind was racing, and one of the thoughts was this. What if a woman caught a new type of virus which ate Oxygen molecules in somenes body, so it had to break the water bond in her to get it, which would leave Hydrogen. This would just create gas inside of her, but the virus would go for the most fatty/watery areas of her, a.k.a. breasts, belly, butt. If anyone wants to work on this as a story idea feel free, I think it leaves alot of creative playroom.
This woiuld be awesome! She'd have all the flight potential of helium with the explosive potential of hydrogen. Hope there aren't sharp things in her house...or open flames!