en CB01 OFFICIAL. A Derry teacher turned filmmaker transforms a classroom in his school into a claustrophobic hallucination. Created over two Sunday afternoons this award winning film stars a fellow teacher and local pupils. Terence McDonald and Gerry Wills have worked together on several films; with Nebelung they achieved international success demonstrating their flare weaving this darker postmodern tale of the anxious reactions of a German teacher triggered by an old photograph.