I think it aughta be quicker than that, if 4000 psi exploded not just the valve threads sheared off an say tank went like a rocket no im talkin blow up like BOOOOM that wont even ring your ears it a knock you out so fast like 5 minutes what did you get immobilized by the blast an bleed out? or what I think the shock of a bottle busting anywhere near 4000 psi I dont even wanna know it would be like an artillary round flew into your room thru the window an blew it up instant death. You ever fill a bottle with baking soda an vinegar those dont get over 300 psi an the plastic gets deformed so bad it splits sometimes into multiple deformed pieces I can only imagine 4000+ psi aliminum carbon fiber bottle BOOOOMMM you wont even hear it if your close to it while it explodes