Shah Rukh Khan seems to experiment with a slow and steady strategy, after the box office debacle of his much-hyped dwarf film ‘Zero’. The actor was reportedly quick to walk out of astronaut Rakesh Sharma’s biopic, which he took up on Aamir Khan’s suggestion. SRK was said to start off with the third installment of his hit thriller series ‘Don’ with filmmaker Farhan Akhtar. However, Farhan has busied himself with Rakeysh Omprakash Mehra’s ‘Toofan’, leaving little time for him to complete the script of ‘Don 3’. In the meantime, Shah Rukh Khan is reportedly pacing through scripts, thinking well before he signs up his next.