Don't need sleep. Get that second wind and go. Get home after pulling a 20 hour shift and wide awake. LOL Had to get drunk to go to sleep. Called them my 12 oz sleeping pills. Many many days like that. Loved it. My Dr, called it Fight or Flight syndrome. So many years you suppress the serotonin and live on adrenalin. The brain cuts back on the mellow stuff so you are just going on the adrenalin.
Larry