"Klaatu barada nikto." You are thinking of "Gort" > Gort is an eight-foot tall, seamless robot apparently constructed from a single piece of "flexible metal".

"Klaatu barada nikto." You are thinking of "Gort" > Gort is an eight-foot tall, seamless robot apparently constructed from a single piece of "flexible metal". He is but one member of a "race of robots" invented by an interplanetary confederation (described as "A sort of United Nations on a Planetary level" by Klaatu, who is a representative of that confederation) to protect their citizens against all aggression by destroying any aggressors. Klaatu describes "him" as one of an interstellar police force, holding irrevocable powers to "preserve the peace" by destroying any aggressor. The fear of provoking these robots acts as a deterrent against aggression. ~ https://en.wikipedia.org/wiki/Gort_(The_Day_the_Earth_Stood_Still)#1951_depiction https://en.wikipedia.org/wiki/Gort_(The_Day_the_Earth_Stood_... The gunless world will arise when everyone voluntarily puts them down together and they rust along with the factories that made them.