Little Darlin’s (1981)

A slim brunette in her 20s with brown hair in a ponytail and a headband is on her knees sucking a guy’s dick right at the start. Her lips are tight, head moving steady — looks like she’s actually into it. The guy getting blown is older, gray-haired, slim, wearing glasses and a beard, partially dressed like it’s mid-action. Another guy is in the room too, similar age, also gray and slim, standing back like he’s waiting his turn. Then the vibe shifts — suddenly the girl’s running up the stairs, half-dressed, laughing or scared, and two guys are chasing her, one older and one younger, in a dimly lit stairwell. The camera’s high up, wide shot, makes the chase feel chaotic, almost messy in a real way. It cuts before anything on the stairs happens, but the energy’s raw, not staged. The whole thing’s got a fly-on-the-wall feel, like a home video with actual tension.