Light vs Dark (Monolith)

In the middle of the music video, the scenes begin to alternate between two views of the same lady; one dancing gracefully on flowers, and the other thrashing the room with tar. Luis and Joel (the song artists) appear to have been already taken over, with fully black eyes streaking down their faces as they oversee her downfall. It culminates to both ladies getting sucked into the monolith, but the serene lady is lured to it while the corrupted other is dragged against her will.

Example of:
Contrast Montage