Predestination
Not overly confusing but Timecrimes was a bit of a headmelt at the time
Triangle
Primer
Upstream Color
The Endless
Enemy
Pi
The Signal
The One I Love
Donnie Darko
Holy Motors
Under the Skin
The Holy Mountain
Primer
Upstream Color
The Endless
Enemy
Pi
The Signal
The One I Love
Donnie Darko
Holy Motors
Under the Skin
The Holy Mountain
I'd also add:
The Prestige
Black Swan
A Cure for Wellness
Dark City
Frailty
The Double
Arrival
Cloud Atlas
The Blackcoat's Daughter
You Might Be the Killer
Marjorie Prime
Clean, Shaven