The 3 Idiots actor is currently busy shooting for his Tamil film, Vettai also starring Arya, Sameera Reddy and Amala Paul. It was on the sets of the Tamil film that the actor injured his knee again. Apparently, during the shoot of 3 Idiots, Madhavan had met with a freak accident injuring his knee severely. While proper rest and care healed him then, the injury on the same knee during the shoot of Vettai has aggravated it. The actor was shooting a rain sequence when he slipped and fell, hurting the already injured knee. The actor is undergoing physiotherapy and will soon be heading to Australia for further treatment. If the situation gets any worse, Madhavan may even have to undergo surgery. Here’s hoping the actor has a speedy recovery.