Trivia: Another comic book reference: Most of the film is shot through door frames, windows, between seats or otherwise "framed" like comic book panels.
Trivia: Another comic book reference: they both have signature colors. Mr Glass' color is purple (his clothes, the envelope he leaves on the windshield, interior of his house, etc.) while David's is green (all of the interior in his house, his raincoat, his suit on the train etc.).