Miley Cyrus was Caught Smoking What?!?

The video of Miley Cyrus smoking a bong at her birthday party last month has raised many questions among her fans and critics. Is this proper behavior? What idiotic friend filmed this act?
And what the heck if salvia?
Indeed, the substance Miley inhales on camera is an herb that is legal to possess in California. However, it has been listed as a "drug of concern" by the U.S. Drug Enforcement Agency.

It looks like this friend of Miley Cyrus has already had a hit or two of salvia, doesn't it?