Plot[ edit ] After foiling a purse snatcher who tries to steal Jenny Johnson's Uma Thurman purse on the subway, Matthew Saunders Luke Wilson becomes Jenny's "hero" and starts dating this shy stranger. After several dates, Jenny displays increasingly neurotic and aggressive behavior, becoming more demanding and ultimately injuring Matt and destroying his bed the first time they have sex. Soon after, Jenny reveals to him that she is in fact the voluptuous blonde superheroine, G-Girl, who accidentally received powers such as flight, superhuman strength, speed, and senses, invulnerability, super breath, and heat vision after she was exposed to radiation from a crashed meteorite as a teenager. Jenny starts to become more controlling after she reveals her powers and Matt starts to lose his mind. Hannah Lewis Anna Faris , Matt's co-worker, has a crush on him despite the fact that she is going out with a handsome but shallow underwear model. As Matt and Hannah's friendship develops further, and after becoming aggravated with Jenny's escalating jealousy, Matt ends the relationship.