Hector DeJean, played by Rhys Ifans, is a stereotypical hard-ass-jerk character in “Berlin Station”, here he’s being interviewed/ interrogated  for an investigation into an “op” that went “bad”.

This is his response to being asked :

Tell me more about the “delusions”…

“Its fucking textbook:
you see something traumatic,
it leads to nightmares.

Nightmares lead to insomnia,
you see all kinds of weird shit.”

Boom.