refraction of water as it falls
<a href="//commons.wikimedia.org/w/index.php?title=User:%E9%BB%83%E6%99%AF%E6%B7%B5&amp;action=edit&amp;redlink=1" class="new" title="User:黃景淵 (page does not exist)">黃景淵</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>