West Side Story is a 1950s musical based on Romeo and Juliet, about rival New York City gangs, the Jets and Sharks. Tony, a Jet, falls for Maria from the Sharks. The song "Something's Coming" uses a musical technique called a triton to ominously foreshadow trouble for Tony, clearly communicating this to the audience. Bill Fontana recorded pigeon sounds in church ruins and played them back through speakers in the same spot, now a museum, creating a time displacement illusion of pigeons still present. While both use found sounds, the musical aims to entertain without requiring thought, whereas Fontana's installation means to evoke self-guided interpretation.