The Live Reaction meme format evolved from cable news graphics, most notably the 'Live Tucker Reaction' overlay used during high-profile broadcasts. Internet users began parodying the intense, often stoic expressions of news anchors by placing the graphic over various fictional characters, celebrities, and pets. It is primarily used as a response to controversial or bizarre content online, signaling a silent, often judgmental, witness to the post. The format gained massive popularity on platforms like Twitter and Discord for its versatility and comedic timing.