Superstar Shah Rukh Khan is a bunch of nerves these days, and it seems he will remain so till his much-awaited film "Don 2: The King Is Back" hits the screens Friday. However, he says this nervousness gives him a big high.

"Greatest high of filmmaking is the nervousness the team shares before release. Nobody else understands the pain, the stakes, love and letting go, " Shah Rukh posted on his Twitter page.

The actor has been city hopping to promote the Farhan Akhtar-directorial, which also features Priyanka Chopra, Lara Dutta, Boman Irani and Sahil Shroff. The movie is a sequel to the 2006 film "Don: The Chase Begins", which was a modern day remake of the 1978 Amitabh Bachchan-starrer "Don".