. >> what a doofus. >> like got to be a better way. i know it's easy to put it in but easy to take it it out, too. >> he got away. but the oentnlywners have turned the video over to police. they are investigating and looking for this fella. >>> you've got to shake your head and wonder, where are the parents? teach your kids not do this. a fight in the middle of street in east memphis, tennessee. fight's over. not yet. two guys squaring off in the middle of the street someone else in the black car trying to break it up their way and running down the guy with the red shirt than doesn't quite break it up. makes things worse. the guy originally squaring off with the person now attacking him. the guy in the black car jumps out and, watch. he gets run down by someone else. memphis police are investigating this incident and they hope the video going viral will help identify some people involved. >> i think the big issue here these people should be old enough to make better decisions on their own, forget the parents' responsibility. >> the sam

. >> what a doofus. >> almost like there's got to be a better way. >> it's easy to put tips in but it's easy to take them out. >> it was so easy for this guy that he got away. however, the owners of this burger place have turned this video over to police and they are investigating. they are looking for this fellow. >>> considering the amount of dash cams that we see, i think it's fair to say we qualify as experts. i'm going to put it to the test to see if you guys can spot the danger. this first video comes from dash cam owners australia. what dangers are we seeing there? >> i will go with the road. >> the weird intersection that's coming up. >> a tree is going to fall. >> i'm going to guess there's a kangaroo. >> you're the closest. this guy is not paying attention in the white truck when he decides this is a good time he had his breath knocked out of him. he just had some bruises there but totally avoidable, ridiculous accident. >> right. >>> this one from russia. there's a car, there's a straight road there's a blue sky. where's the danger coming from? good guess. watch. boom! fortun

. >> i thought i told you to have one, doofus. >> it was downright sinister. >> it's kind of already in motion. you need to do your part. >> the most sick and twisted case you've ever -- >> absolutely. just unbelievable. >> "family affair." >>> but first, a story of doctors, love, and a mysterious drink. >> nothing in this case makes sense. >> they say doctors make the worst patients, no matter how sick. >> is it his high blood pressure? is he having a heart attack? >> but this doctor wasn't just sick. he was dying. >> no one knew exactly what it was. >> and then, they found the crystals. >> it's a poisoning case, which are very rare. >> but solving the medical mystery didn't solve the main mystery. who poisoned him? >> he took a drink of it and said, "there's something wrong with this." >> was money the motive? or was there another reason? >> everything about this case is nuts. it's sex, lies and audiotape. >> turns out this busy doctor also had a busy love life at home and at work. >> she loved him. >> i think she loved dr. blumenschein. >> i said, "why?" she said, "it was just sex