"How cool was that?" might be a typical reaction you hear on this show with celebrities and kids reacting to viral videos. Based on popular online show "React," "ReactToThat" features panelists -- which include stars of Nickelodeon -- responding to online videos they watch. But passively watching short clips isn't all this program has to offer. Each episode features panelists tackling a physical challenge based on a video, which could be making a basketball trick-shot or attempting the world record for fast clapping.