Audio problem: When they are playing "Whiplash" it shows a hand playing piano. When the hand is going up the piano (to the right) the music goes up, then down. Going up the piano should only play higher notes. (00:18:20)
Audio problem: When Nee-man gets his first blister when practicing the drums alone, he punches and breaks his fist through the snare drum. He continues to rock on with the snare drum audible in the practice exercise soundtrack, immediately after breaking it. (01:00:00)
Answer: Fletcher recruited Neiman with the intention of ruining his career. He informed Neiman they would be playing songs he was familiar with, but secretly had other songs planned. Fletcher knew there would be influential people in the audience, whose opinion of Neiman would be made or destroyed based on his performance. Neiman attempted to play along with the unfamiliar songs, but couldn't. He decided to prove his talent by playing Caravan. This impressed Fletcher who was angry at first but came to respect Neiman and help him out.