'Costao' director Sejal Shah revealed that Nawazuddin Siddiqui swam in a crocodile-infested lake for the film despite not being a "great swimmer". "Nawaz always took on tough scenes...he insisted on doing it (swimming in crocodile-infested lake) for real," Shah added. She also shared that Nawazuddin did his own stunt in another intense scene featuring a high-speed bike chase.