If you thought seeing Aamir Khan in a negative role was the USP of ‘Dhoom 3’, think again. If reports are to be believed, Aamir will be seen in a double role in the film. And this will be the first time that the superstar will be seen in a double role in his career. A report in DNA says that Aamir’s character will have shades of grey and that has something to do with his twin brother who is sick. This twist in the tale will come towards the end of the story. This will apparently be the surprise element of the movie. Reportedly, it was producer Aditya Chopra’s idea to introduce Aamir’s twin in the movie. If Aamir plays a double role, Dhoom 3 will surely be double the fun!