A slow soft spinning electric toy motor sound. I recorded a toy car with my akg p420, it could be used for a remote control car or a device with an electric motor.
Slow breathing almost close to mic. Could potentially be used in one of those scenes in a movie when someone is in shock or cant hear because of a bomb blast or crash or something.
Recorded this on a zoom h4n. I take a couple of deep breaths then a couple of sharp inhalations (gasp). Feel free to share where you end up using this sound :).