The line comes from the Simpsons episode 22 Short Films About Springfield, aired in 1996, in the sketch where Principal Skinner invites Superintendent Chalmers to lunch and burns the roast, leading to the legendary steamed hams exchange. Clips of the scene became a YouTube meme in the late 2000s, spawning countless remixes and parodies built around the aurora borealis gag. The greeting now circulates as a standalone reaction sound on TikTok and Discord, used whenever someone arrives somewhere they probably should not have.