♪ How can you see into my eyes, like open doors? ♪
After the death of her father, Elektra retreats to her family mansion where she trains to kill Daredevil, by spilling sand all over her floor. Try not to think about how this training course was set up in a house, causing sandbags to drop at random times.
The documentary on the making of Daredevil shows that, as many may guess, this mansion location is a soundstage. How else are you going to hang multiple sandbags from the ceiling, along with the wire harness needed for the stunt flips that Elektra makes.
(Daredevil, 2003)
MCU: Location Scout 