How Movies Being Made on Instagram: "In this high intensity action scene, the hero struggles in open water as a damaged vehicle sinks, creating real urgency and danger on screen. What looks like a life threatening moment is actually filmed in a controlled water tank, with safety divers, stunt coordinators, and precise timing guiding every movement. Behind the scenes, green screens replace the ocean, while practical water effects sell realism. The actor performs much of the stunt himself, support