Action movies typically feature one or more heroes who undertake physical challenges and fights to defeat villains and overcome life-threatening situations. They frequently face incredible odds such as being chased by vehicles. These movies usually contain high levels of violence including fist fights, gunplay, and explosions, which is why most receive ratings of 15 or 18. For example, in Die Hard the protagonist John McClane has to save civilians from German terrorists attacking an office building alone despite being at a disadvantage, ultimately defeating the leader by throwing him out a window.