Yah, Praying Mantis kung fu. Those are my nephews. They hadn't sparred in about a month, so were a little sloppy.
Andrew, the one in white, likes to do chokes and takedowns. He tried to set up for a choke from behind, but forgot to unbalance the other person. So Nick, the one in green, was able to turn around to avoid the choke. Nick grabbed Andrew around the neck and tried to do a takedown. Andrew tried to reverse it on him by throwing him backwards. When that didn't work, he switched his leg in front of Nick's and tossed him.