The line comes from Jurassic Park, released in 1993 and directed by Steven Spielberg. It is spoken by game warden Robert Muldoon, played by Bob Peck, while hunting Velociraptors in the park. Realising the raptors have flanked him and are hunting in a pack, he whispers the words seconds before he is attacked. The scene became one of the film's most quoted moments and later spread as a meme and reaction clip for any opponent, animal or friend who proves unexpectedly intelligent and dangerous.