In one of Hollywood’s first nude scenes (maybe THE first) she ran naked through the woods :)
If you're talking about the 1933 film,
Ekstase / Ecstasy, it wasn't Hollywood but an Austrian-Hungarian made film. It also had the first orgasm depiction (Hedy later said the director stuck a pin in her behind). The film can be seen on YouTube at (
http://www.youtube.com/watch?v=NY_S3_VaEP0).
There is a book called Hedy's Folly, the Life and Breakthough Inventions of Hedy Lamarr by Richard Rhodes.