Edgar never planned to make a documentary on The Berlin Patient - he had originally wanted to go to Berlin to feel the city that Timothy Ray Brown once called home, and write a fictional film inspired by it. But his old friend Dzul Sungit in Rotterdam suggested that he bring his camera down to film Edgar's journey - the deal was that they would stop rolling if things got boring. It never did and a documentary film-diary was born.
Timothy Ray Brown ('The Berlin Patient') did not see the final edit of the film until a week before its Singapore premiere.
Edgar is a cancer survivor who, during chemotherapy in 2007, tried an unorthodox method of beating his nausea - he ate whenever he was nauseated. Unbelievably, it worked.
Timothy Brown and Edgar Tang are both blood-cancer survivors, and have been in remission since 2008.
In the scene where Edgar hunts Timothy down in the Lloyd Hotel, he actually comes face-to-face with Timothy around a corner but is so shocked he walks past him without a word. Upon realizing his folly, Edgar turns back but it is too late - Timothy had entered a room, and Edgar did not know which one.