Filmmaker and music composer Vishal Bhardwaj, who directed Gulzar's 'Maachis', on Wednesday reminisced how he and the singer KK, or Krishnakumar Kunnath, began their journey together with the movie. KK died on Tuesday night at the age of 53, only hours after his performance at Kolkata's Nazrul Mancha auditorium. Doctors at the hospital speculated that the death was caused by "cardiac arrest."