This is a picture of an Italian Special Forces soldier who went through a 72 hour firefight with no sleep!
The sleep deprivation of 3 days is torture enough, let alone having people shoot at you continuously.
As you can see, his pupils are pinpoints!
This guy has probably had 5 years taken off his life with this, his adrenal glands are probably cooked beyond all normal function ever again. Sad, yet fascinating.