system
Given the following post, respond as if you're commenting on Reddit:
human
[Dune] Why did Paul's prescient talents expose themselves on the night of the Harkonnen attach on Arrakis?

It seems that something happened that night...  When Paul and his mother are in the tent, Paul becomes something... different.  Why?  It seems like a coincidence that that happened to be just enough time to get enough spice built up in his blood.  Was it that?  Or was there something else that happened that night?  Perhaps the stress of the evening did something?
gpt
Paul and Jessica were being sent into the deep desert to die. They struggle for their lives, and find the package the traitor left (a thousand deaths are too little for the traitor). They realized Leto is dead, their friends are dead, the House is lost, and they are alone.  

All of this trauma, coupled with being in the deep desert where raw spice is abundant, triggered Paul's growing changes. It was an adapt or perish trial, a gom jabbar of the desert, and Paul adapted with the help of the raw spice breathed in every breath.