I worked in a "smart building" and it was fun to watch people do this even when lights came on automatically.
I heard this story a couple times removed, but I believe it’s true. One guy’s father like to play practical jokes on his kids. The kid had gone out to see some scary movie. A little while before kid’s due home, dad starts soaking his forearm and hand in cold water. When kid pulls into the driveway, dad goes into kids room, turns off lights and puts his hand over the light switch. Kid comes in, automatically smacks his hand where the light switch should be...and feels a cold clammy hand. Kid took the screen door off the hinges getting out of the house.
I have never entered a dark room since without thinking of that story because one day, I know...