the type of person jeanetta collinsworth was -- a teacher, a mother, and an advocate for cancer research. they've set up a foundation called joeknowschildren in her honor. coming up, a man is knocked unconscious in front of a supermarket, and nobody seems to be doing anything. >> many of the people that walked by wanted to do something but felt like they couldn't, you know? >> but why? and will someone help before it's too late? >> also -- get back. >> i'm getting back in my car. >> a face-off between a cop and a great grand ma. >> you're going to be tased. >> i'm getting back in my car. >> no ma'am. >> does this officer do the right thing? when "caught on camera: what would you do" continues. with unitedhealthcare, i get personalized information and rewards for addressing my health risks. but she's still going to give me a heart attack. that's health in numbers. unitedhealthcare.