Insomnia vs Rio Bravo

I’m 3/4 way through Christopher Nolan’s Insomnia. While watching it I keep thinking of Howard Hawks’ Rio Bravo with John Wayne. I have no idea why. What might it be?

God only knows. Some weird wiring in your brain established a connection.

When I play solitaire on my phone I keep recalling a scene from HBO’s True Detective (which had nothing to do with solitaire).