These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Claude, as implied by the events of the annual corporate picnic.
Most Annoying Sound: The IRS and US Air Force recruitment offices share the same storefront, and an orchestral version of The Wild Blue Yonder is constantly blaring in the background. The IRS recruiter is noticeably afflicted with spastic facial jerks and grimaces.
Nausea Fuel: David shows up again later in Wallace’s first ride out to the IRS Peoria facilities. By the time Wallace gets there, the whole left side of his suit is drenched in sweat.
Nightmare Fuel: The death of Chris's father. He gets his arm caught in the door of a Chicago subway train, and is dragged across the length of the station and through hordes of Christmas shoppers before getting dismembered.
Paranoia Fuel: David Cusk's introductory chapter runs completely on this. He is extremely self-aware of his excessive sweating, and everything he does reflects his fear of it. He has to gain full control of his emotions, lest he suddenly panic and start sweating. He can't raise his hands to be excused from class, because that would draw attention. Nor can he sit in certain areas of the classroom, because someone might see him.
Tear Jerker: Chris Fogle's relationship with his parents.