I wanted to see him out on the town, marauding and philandering, invisible style. But no, he stays in the lab and tries to exact revenge on ex-girlfriends and co workers. The fact that he is invisible is of little import. He could just as easily be covered in fur or made of ice. The story would basically be the same.
Evil scientist goes nuts.
What looks good in the beginning of the film is lost, and people survive so much physical punishment that their survival is ridiculous. If you love Kevin Bacon's shlong, then go see Hollow Man. Otherwise, rent it when it comes out on video. Not that it is a terrible movie, it's just that it's nothing special. Well, how much can you expect from the director of Showgirls.