Who Can It Be Now? by Men at Work is a classic rock song from Australia. The track delves into themes of paranoia and isolation as the protagonist fears unexpected visitors knocking on their door. The song's catchy saxophone riff and haunting lyrics express a deep sense of anxiety about the outside world. Poignant moments include the repeated line 'Who can it be now?' which underscores the character's constant worry and reluctance to face whoever is out there. The song encapsulates the feeling of wanting to retreat from society and the overwhelming nature of external pressures.