I Was a Teenage Serial Killer is an underground no budget film written and directed by independent filmmaker Sarah Jacobson.

Ed Halter, writing in the Village Voice, considered it "a key film of that decade's angrily subversive underground cinema.

The woman than drives to meet with her brother (Bob Hendershot) who begins heavily drinking and lecturing her on her dating habits, suggesting that she find a man to have children with.

Following the screams, Mary finds a fellow serial killer, Henry (Gorey), murdering a man (Steven Nereo), and assists him.

When the man suggests that the abuse may have been her fault due to her physical attractiveness, she holds a broken bottle to his throat and rants about the men in her life who have never taken her story seriously.