The characters in the movie wear watches that are specially designed for the blind. During the course of the movie, Hrithik's character gifts Yami a watch that announces time every hour.
It is a known fact that blind people are very capable of dancing and have a heightened sense of rhythm. There are tonnes of dancers around the globe who are blind and yet can perform elaborate and intricate dance performances. Hrithik and Yami's characters borrow from the same sentiment and dance because they are happy and express it by dancing.
