Read the nominated passages at The Guardian.
Oh my god. My favorite is very definitely the 'demon eel' bit from Paul Theroux. "A whole creature of live slime"? EEEEEW.
Oh, wait. The bit from Giles Coren's Winkler is kind of amazing, too. "She grabbed at his dick, which was leaping around like a shower dropped in an empty bath"? What does that even mean???