Maybe he used the unintelligible groaning as a release valve for some of his fear.
Each bucket has a release valve on the bottom which is controlled by the helicopter crew.
Perhaps going back again to the quality of life, was it a a release valve for the frustration of the places?
Sometimes freedom of speech provides a release valve for social tensions that would lead to revolution.
His right hand went to his pocket, felt for the release valve, and gave it three complete turns.
He pulled the release valve on the reserve tanks and lost 1000 gallons.
He came to the hose, grabbed it and pressed down on its release valve.
A release valve lets air out of the glove if it feels too snug.
She was a little more than one of Miles' sexual release valves.
If you can do this, any punch line will work as a release valve.
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