Best parent: Burt le Clos, father of South African swimmer Chad. "Unbelievable!"
http://www.youtube.com/watch?v=sYa0r43Xn-8

Best child: Rihanna Farah, daughter of Mo. Really, really excited by dad's two gold medals, but still just as embarrassed as any other kid when seeing her parents kissing.
http://www.metro.co.uk/olympics/907499-mo-farah-winning-gold-for-great-britain-is-the-best-moment-of-my-life