This reminds me of part in the book “Kon Tiki.” Thor Heyerdahl asks the British medical officer regarding a mysterious shark powder, “Sir, can we rely on this powder?” “Well,” said the Englishman, smiling, “that’s just what we want to find out ourselves!” http://content.surfline.com/sw/content/mag/pulse/2002/2/06_11_sharkshield.jsp