possibly a foreign language film (maybe german) but not sure. a guy breaks into this flat and is caught by the owners who then knock him out and chain him to their radiator or something where they keep him for a while. never saw it to the end so don’t know what happened but the last part i remember is he manages to set himself free. it kind of had a similar style/feel to the german movie ‘the edukators’, probably why i think it might be german. please help, it’s proper bugging me!