Lady Gaga revealed on Instagram this Friday that her song 911 'hides in nothing but the truth' with regards to mental health.She released a music video for the number that day, depicting her hallucinating after miraculously surviving a life-threatening car crash.'This short film is very personal to me, my experience with mental health and the way reality and dreams can interconnect to form heroes within us and all around us,' she wrote in an Instagram post promoting the video. 'Poetry of pain':Lady Gaga revealed on Instagram this Friday that her song 911 'hides in nothing but the truth' with regards to mental healthShouting out The Cell director Tarsem Singh, who helmed the 911 video, she wrote: 'I’d like to thank my director/filmmaker.