A bombed-out city, a woman in peril, and a flesh-eating monster emerging from the darkness: the new season of The Walking Dead, or the latest PSA on cardiac arrest from the Heart And Stroke Foundation? Turns out it's the latter. Instead of promptly devouring their helpless victim when she has a heart attack, these helpful zombies perform CPR… and then something else happens. For those confused about the moral of the story, the PSA ends with the helpful, if morbid, little reminder: CPR makes you undead.