The European Action Theaterâ„¢ Ensemble (EAT) was founded in 2006, in Berlin, by Sten Rudstrom, in order to create a group of professional performers who practice and teach of Action Theaterâ„¢ as a common ground.. Action Theater is an improvisation training developed by Ruth Zaporah. The body-oriented improvisation method treats movement, voice and language equally as expressive forms of improvisation. Comparable to the improvised music, the performers work with their own bodies as an instrument in empty space.