Jurassic Park, released in 1993 and directed by Steven Spielberg, introduced Robert Muldoon as the park's experienced game warden who understood the velociraptors better than anyone. His observation that they systematically tested the fences became one of the film's most quoted warnings, building the raptors' reputation as intelligent hunters long before they escape. The line has since spread online as a reaction clip for any situation where someone is methodically looking for a weakness, a loophole or a way around a barrier that was supposed to contain them.