It happens usually when there's nobody around and you're in a
dark room. Most likely, soon after you sit on the couch you will ask "Helloooo?" to make sure truly nobody is in the room. On occasion, someone will
crack up laughing at your stupidity and give away their
hiding place.
Example 1:
Person 1: "I'm just going to
sit on this couch now.....helloooo?"
Person 2: "......HAHAHAHAHAHAAAHAH"
Example 2:
Person 1(on the phone): Yo man, I'm sitting on a couch right now. ...
wait up,...hello???
Person 2: (on the other line): "ok then.."
Person 3(hiding): "AHAHAHHAHA
YOU'RE SUCH AN IDIOT"
