Put this clip at the doorway moment in your edit, right after the approach and before the reaction shot. Set it up with a door knocking sound first for the arrival, then follow the entrance with a dun dun dun sound when the reveal needs a heavier payoff.
Über diesen Sound
This clip is a door squeak sound effect lasting just under six seconds, built around the drawn-out creak of a hinge as a door moves. It feels tense and slightly awkward, turning a simple entrance into a moment that sounds old, neglected and hard to ignore.