Most of us are terribly guilty of checking our cell phones constantly -- but consider exactly how fast you check your phone when you hear that tonal alert!
It's pretty darn fast, as this video from the social provocateurs at YouTube channel Whatever proves. They pranked a host of unsuspecting people by having a man play the 'notification' sound on his phone as he walked by.
Like clockwork, everyone whips out their devices immediately. We can't decide if this prank is hilarious or a little bit sad -- probably both, because it 'dings' so close to home.