Dredd: Been wondering when you'd remember you left your helmet behind.
Anderson: Sir, a helmet can interfere with my psychic abilities.
Dredd: Think a bullet might interfere with them more.
The shot before Dredd tells Anderson the terms of the assessment is flipped: you can tell because the judges walking in the corridor have their badges pinned to the right side: with every other judge in every scene of the movie, it's on the left side.
Dredd's count outside the medical center is unusually perfect for time in a movie: there are exactly twenty seconds between his warning and the first shot.