One motzei shabbos in 1953 the Lubavitcher Rebbe told a story to his chassidim about how the Tzemach Tzedek parted the clouds with a handkerchief so they could make kiddush levana and also a bonus story with the Baal Shem Tov. Also at https://soundcloud.com/barak-hullman/parting-the-clouds-with-a-handkerchief.
