Reminds me of a 0.1-version of this application that I heard about some years ago: some guy saw a fairly fast-moving heading toward a red light with pedestrians

Reminds me of a 0.1-version of this application that I heard about some years ago: some guy saw a fairly fast-moving heading toward a red light with pedestrians crossing with the driver looking down at something. Guesstimating the car was about to be too close to stop in time, the guy threw his cell at the car and got the driver's attention.