You know that high pitch beep you hear after something super loud, like an explosion? here's a five second effort to reproduce that sound. It fades out towards the end like the person either comes back to themselves or passes out. There's probably some on freesound already but i couldn't find them so i just made my own in audacity.
Sound of the sonic boom explosion caused by the russian meteorite over chelyabinsk, russia on february 15th, 2013. Taken from various youtube videos of the event, mixed, and sweetened with a bit of reverb.