Our PhD student Irina Smirnova-Pinchukova used FIR observations with the flying observatory SOFIA aboard Boeing 747SP to study the [CII] 158µm emission line in a sample of 5 AGN host galaxies from the CARS sample. Irina discovered that, surprisingly, one of the targeted galaxies, named HE1353-1917 at z=0.035, exhibits ten times higher [CII] luminosity than expected from the star formation rate. Hence, there is an additional excitation mechanism at work in this specific galaxy that is injecting additional energy in the ISM which cooling through the [CII] line. A companion paper by the PI of CARS, Bernd Husemann, is discussing the properties of a massive multi-phase AGN-driven outflow on kpc scales also discovered in this galaxy. Since the [CII] excess is confirmed to originate from the galaxy center, Irina argues that the [CII] excess is directly powered by the shocked-heated gas in the outflows. Our observations at low redshift are crucial to interpret [CII] observations of high redshift galaxies with ALMA.