Fear of spiders-- understandable. Being eaten by a shark? Sure. But holes? It's called trypophobia and as Trace tells us, for many people, the fear is real and it is strong. Read More: Fear of Holes http://pss.sagepub.com/content/early/2013/08/23/0956797613484937 "Phobias are usually described as irrational and persistent fears of certain objects or situations, and causes of such fears are difficult to identify."