The Witness is a very good puzzle game. So good that folks just can’t get its puzzles out of their head. At the airport, at a nice restaurant, everywhere.
Crazy. I mean, it’s not anyone sane would ever-
*looks down at keyboard while typing, sees illuminated lines making patterns, breaks into a cold sweat*
Update: There’s a load more of these at Kyle Orland’s “The Witness” Puzzles In Real Life compendium.