system
Given the following post, respond as if you're commenting on Reddit:
human
[The Jaunt] Why does a person who Jaunts while awake suffer immediate physical symptoms?

I get that the mental stress of experiencing the Jaunt awake drives them insane, and that the shock could eventually turn their hair white, but why did Ricky's hair grow in the brief instance his body experienced the Jaunt?
gpt
> The thing that had been his son bounced and writhed on its Jaunt couch, a twelve-year old boy with a snow-white fall of hair and eyes which were incredibly ancient, the corneas gone a sickly yellow.

It doesn't seem to me that his hair *grew* necessarily, only that it managed to change color (along with the eyes) during the Jaunt.  The same was true of Rudy Foggia, the prisoner - his hair had turned snow white, but no other physical changes were noted - specifically, his face was unchanged, though it gave off an air of incredible age.

So all that we can say for sure is that the shock of a conscious Jaunt causes enough of a reaction in the body to turn hair white and give a sickly color to the eyes, though no other physical changes are apparent.