The effect was made by opening and closing a cupboard door slowly to get the high pitch noise. Sound recorded using a samsung galaxy s7 edge and edited in audacity. (created by derek g. ).
A mix of (1) bsumusictech's metal door in mu 1. Wav file (http://freesound. Org/people/bsumusictech/sounds/83507/) and (2)julien matthey's jm_amb_int_lift 01 - sequence. Wav file (http://freesound. Org/people/julien%20matthey/sounds/112354/) to make a crashing elevator gate sound. Both sounds are licensed under the creative commons 0 license.