Not so fun fact. If you experience that as a result of a high burst of radiation, odds are you're going to die.
Radiation Sickness is like something out of a religious text anyway.
I mean, a flash of light that is only visible to biological things. A taste of metal in your mouth. And then there's the slow process of dying itself, where the body essentially rots while you're still alive.
One of the typical courses of the disease for heavily irradiated people is that of the "living dead", when after a couple days of feeling like shit, enough body tissue and nerves have died, so that you're no longer feeling pain or fatigue. Before, you were unable to move due to pain, suddenly, you can walk around and you feel almost healthy. Then you get spasms and start to suffocate... radiation sickness is a really nasty way to go.
And speaking of which, apparently the austrian military had 3 categories of radiation poisoning for their soldiers during the cold war:
They essentially boiled down to
1) Fit for Service
2) Unfit for Service
3) Only fit for Service
Category 1) applies to those with small amounts of radiation poisoning, who are barely affected at all and can continue serving in the military. Catgory 2) is when you're irradiated so much, that you need medical treatment and 3) is when medical treatment no longer affects your chances of survival, thus you pretty much serve until you drop. That's some "Warhammer 40k Imperial Guard"-type shit.
Gets even worse. One former soldier once told me: When a nuclear bomb goes off, soldiers were trained to lay down on the ground, ontop of their rifle.
Officially, this is supposed to prevent an ammo cook-off or something, but inofficially, this is only meant to make the rifle absord less radiation, so it can be used longer. That's the pragmatism and cynicism that the military is famous for. "We can't protect the soldier, but at least protect the rifle, it's harder to replace..."