The cause
Luis jerked away seven times that night. He had edited the footage so that seven short pieces of footage would play one after another. These clips all had, besides showing images of Luis sleeping, one thing in common: the cause of Luis’ sleep problems was clearly visible.
The reason that Luis couldn’t breathe at night was… his cat! On all seven of the clips it was clear to see how Luis’ furry friend crawled closer and closer to his owner, until finally deciding to lay on top of his face. Of course he couldn’t breathe, his nose was being held closed by the cat!