here's vicki mabrey with the story. >> reporter: this is what disaster looks like, just seconds before it happens. in this car, four, happy, healthy tangers out to have fun, until the driver's attention is diverted by texting. what happens next is frightening, gory, and very realist realistic. >> i think the texting while driving ad is a new way to go, and will be very effective, because it's almost like watching in real time. >> reporter: to media watchers like barbara lippard, this public service announcement being aired by aaa of the carolinas, is one of the most effective of its kind. a gory, throat-grabbing piece of work known as a shock ad. >> i want mommy and daddy to wake up. >> i think teenagers are used to seeing shocking scenes and shocking accidents, and, you know, they want to laugh at it or tune it out. think the brilliance of this ad is that it doesn't stop there. >> reporter: shock ads are supposed to, as your grandmother might say, put the fear of god into you. there's this one, pushing you to cut back on soda that shows a mandariningi drinking fat. and a brutal one ab

it's going to be called pit hoarders. >> reporter: this is vicki mabrey for "nightline" in new york. >> and you can catch new episodes of "pit boss" every saturday at 10:00 on animal planet. >>> and when we come back, arizona immigration protests, and that's the subject of tonight's closing argument. first, here's jimmy kimmel. >> jimmy: tonight, matthew fox, josh hutcherson. music from the swell season. jake byrd, lind said lohan and "the jersey shore." "jimmy kimmel live" is next. can i eat heart healthy without giving up taste? a man can only try... and try...and try. i heard eating wle grain oats can help lower my cholesterol. it's gonna be tough...so tough. my wife and i want to lowe our cholesterol, but finding healthy food that tastes good is torturous. your father is suffering. [ male announc ] honey nut cheerios tastes great and can help lower cholesterol.