== Hole Punch == 

 Are 'Hole Punch' clouds cassified? I'm linking some articles/examples for anyone interested in answering or adding to the article. 

 It's also noteworthy that a few of the sites I'm linking are actually conspiracy sites  people insisting that UFOs, jet planes, etc. cause this kind of formation. Unfortunately, they don't appear to be sourced. 

 http://www.conspiracycafe.net/forum/index.php?s=815c3be0bde00b54a34b237df732e933&showtopic;=10041&pid;=71709&st;=12