Cannes 2021 curtain raiser: India at the French Riviera India may not have found a place in the prestigious Competition and Un Certain Regard official sections but for two of the strongest films in recent times featured in the sidebars at Cannes this year A still from âDengueâ Engagement: 0 Filmmaker Rahul Jain describes Invisible Demons, his second feature length documentary, as a âsurvival responseâ. Born and raised in Delhi and having stayed away for higher education in the US, he found his health giving way while on a long visit back home. He had to deal with a bad bout of asthma and his lungs were on the verge of collapse.