This is basically Buddha’s reaction shot with James wondering out load, “How dew Oi flush dis ting?”
We pan up from James’ POV to spy a urine-sprayed security camera, which shows James’ transgression in its lens reflection as we see the sliding panel door opening behind him.
This is my first instance of some tricky animation being intentionally downplayed. It sends a message to the audience that this film is less about its technical execution and more about the story that’s about to spew forth.