one location to another". For a minor fight scene involving Cheenu and Natarajan (K. Natraj), Haasan and Mahendra told the stunt choreographer "it shouldn't look like a regular movie fight, but like a street brawl". Natraj and Haasan performed their own stunts by jumping into a stream water. Haasan ensured he looked fit in the song "Ponmeni Uruguthey" and worked out to get a "sculpted physique". This was the film's only song to have rehearsals for one week in Madras (later renamed Chennai). Mahendra did not want to shoot the song in "flat light"; he shot it "in the early morning, from 6am to 8am, then we'd take a break, and then, we'd assemble again by 4.30pm, and then shoot from 5pm to 7pm, as the sun was setting" and managed to finish the song in five days. In April 2006, Mahendra said that the inclusion of the song was "absolutely unnecessary"; the sole reason for its inclusion was the presence of Smitha in the song to help promote the film. Mahendra did not find hiring a train expensive at that time; as a result, he hired a train for the film's scene where Cheenu and Viji depart for Ketti, and another train for the climax which was shot at the Ketti railway station. Although it was raining on the day the climax was shot, Mahendra decided to continue shooting the scene even though the rain was not part of the film's script. It took nearly five days to film the climax. The scene where Cheenu hits himself on the pole while walking towards the train was not planned; Haasan performed it in the middle of the shot. To shoot that scene, Mahendra sat on the steps of the train with a rope tied around his waist with crew holding and preventing him from falling down. Despite being in such a "precarious position", he managed to get the shot right and okayed it in a single take. Haasan refused to use a double, and strove to make Cheenu's injuries look real. In the post-production phase, Smitha's voice was dubbed by Anuradha. Mahendra supervised Anuradha's dubbing session and taught her the methods to emote the dialogues for Smitha in the film. While the film was under production the team was scoffed at for making a film about a youth falling in love with an amnesiac, and that the film would not