Actually, this particular slide is from this little gem from the 70's / 80's:World's Deadliest Fighting Secretshttp://www.amazon.com/Worlds-Deadliest-Fighting-Secrets-Count/dp/B000PGE2AIAuthored by this guy:http://www.theblackdragonfightingsociety.com/home.htmlThe technique did appear in Ashida Kim’s book, Ninja Hands of Deathhttp://fliiby.com/file/41521/le14p4oyag.htmlIt appears on page 13. On page 3, he credits the technique to the BDFS. Abusive comment hidden. (Show it anyway.)
World's Deadliest Fighting Secrets
http://www.amazon.com/Worlds-Deadliest-Fighting-Secrets-Count/dp/B000PGE2AI
Authored by this guy:
http://www.theblackdragonfightingsociety.com/home.html
The technique did appear in Ashida Kim’s book, Ninja Hands of Death
http://fliiby.com/file/41521/le14p4oyag.html
It appears on page 13. On page 3, he credits the technique to the BDFS.