Apparently, the script required Aishwarya Rai to do a 'spontaneous' dance, but Sanjay felt the steps were just not spontaneous enough.
When the choreographer was unable to deliver what Sanjay wanted, he stepped in and choreographed the song himself. The shoot was then completed in just four hours. Those who've seen the song say its one of Ash's best numbers ever.
Sanjay is now contemplating choreographing all the songs in his next film Heera Mandi, which is about classical dancing.
Sanjay had begun his career as a choreographer, and had done the songs for Vidhu Vinod Chopra's 1942: A Love Story. He turned music composer with Guzaarish.