Via Adrants, and as Steve says, one of the most beautiful commercials ever. Watch it:
If that doesn't just smack you in the face with its combination of loveliness/family-heartfelt-ness, you do not have a soul. This spot should feel totally sentimental, contrived, shallow, and time-consuming. Instead, it delivers with superb visuals, great acting, gorgeous cinematography, and, most importantly, a message worth remembering. I may never unbuckle a friend's belt while riding shotgun ever again. Oh, and this is the best PSA ever. If I'm wrong, let me know.