Yves Klein's "Le Seut dans le Vide" (1960). In the 1950s, France was beset by various New Waves as part of a general youth movement. Born in 1928, Yves Klein belonged to the Nouveaux Réalistes, a group of emerging young French artists. Klein’s staged leap from the second story window of his dealer Colette Allendy’s apartment in Paris inspired numerous artists to explore the body’s limits.