agency's live car crash
Ok, not a real car crash, but innocent radio listeners thought it was, which makes this PSA brilliant.
The usual geniuses at Jung Von Matt set it up so a person called into a live radio show to request a song, openly admitting he was calling while driving on the highway... what happens next isn't good. A message was then delivered making listeners acutely aware of the dangers of using their cell while driving.
Impactful... pun intended.