超音波水花：活塞以相當缓慢的速度（每秒一公尺）將碟形物拉入水中，而製造出的氣泡一旦崩塌，便會以超音速將空氣推出。/ FROM "SUPERSONIC AIR FLOW DUE TO SOLID-LIQUID IMPACT," BY STEPHAN GEKLE, IVO R. PETERS, JOSÉ MANUEL GORDILLO, DEVARAJ VAN DER MEER AND DETLEF LOHSE. IN PHYSICAL REVIEW LETTERS, VOL. 104; JANUARY 15, 2010 (splash seguence)
