For a few weeks I have been noticing with ever greater frequency the propensity of people to hold up their hand and move their index finger as if it were a little puppet or being with a consciousness all its own. And I kept thinking to myself, man these guys must really love The Shining. They all keep making that creepy “redrum, redrum” finger movement like that possessed kid.
Turns out that here in Mexico, this is just a culturally approved gestural way of indicating the affirmative. In other words, this just means “yes”. Like nodding your head, but on the tip of your index finger.
It still creeps me out a little.