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.
Crowning Moment Of Awesome: Bruce is kidnapped by Lexo, Gorman and a couple other nutcases who plan on torturing him to death. He goads them into a one-on-one fight, which he wins by biting off Gorman's tongue and throwing him out a window. Made even more awesome by the fact that he's dressed as a woman at the time (don't ask).
Bruce: WHO'S FUCKIN NEXT SPASTICS! WE ARE THE EDINBURGH POLIS! WE HATE NIGGERS! ESPECIALLY THE WHITE ONES THEY CALL SCHEMIES!
Jerkass Woobie: Bruce. He has an absolutely awful life, including being the offspring of a famous rapist and therefore the object of his hometown's abuse, his stepfather making him eat coal, accidentally killing his younger brother and only friend, accidentally killing his first love, being shunned by his family...and the list goes on.
Nausea Fuel: The detailed descriptions of Bruce's flakey, itchy balls are just the beginning.
Nightmare Fuel: Both the book and the film are filled with it. For example, in the film, as Bruce's mental state starts to deteriorate due to his mania and drug abuse, his hallucinations become more and more violent and bizarre. It begins when he sees the corpse of his dead brother appear randomly, and then gets worse when he hallucinates himself and the people around him as warped, deformed animals. The final scene with Dr. Rossi is incredibly unsettling, especially when said doctor TRANSFORMS INTO THE TAPEWORM!
The tearjerker scene where Bruce breaks down in front of Amanda, finally coming to terms with how awful he is and finding comfort in the company of another. One of the most quiet, heartbreaking scenes in the film, which is quickly followed by a genuinely shocking jump-scare when Bruce hallucinates Amanda as a distorted witch.