If you do a general search on it at Google, you can pull up lots of links. Mine is just a general fear of heights, but I can understand this fear too:
Tee hee! I did a google search - but the pictures were frightening me (much like the ones you are posting) LOL!
Think I’ll just forget this thread and go for a quiet stroll on the flat, dry, fenced back yard.
sod;)