In the 2019 movie Joker, during the last scene when Joker is talking to his shrink he starts laughing and the shrink asks him "What's so funny?" to which Joker replies "You wouldn't understand".
After that we see him exiting from that room, his hands are cuffed but his footsteps seem bloodied.
Has he killed the shrink by this point of time? Or is this all just an imagination and in his head?