[brentm]

Dark! And isn't there a Netflix show about that concept?

[dlbucci]

Not sure about a Netflix show, but it's the basic plot of The Prestige.

[airstrike]

MAJOR SPOILER ALERT

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It's from a fantastic movie that would be completely ruined if I told you the name; so refer to the comment below if you don't mind the huge spoiler...

[mjsalsman93]

Living with Yourself.