The following night on an episode of ECW on Sci-Fi , Cena went to the ECW locker room , where he challenged Sabu to an Extreme lumberjack match , which Sabu accepted . The following night on an episode of ECW on Sci Fi , Cena showed up in the ECW locker room , where he challenged Sabu to an Extreme lumberjack match , for which Sabu accepted .