User blog comment:AYET/Talk about chapter 716 and episode 604/@comment-6920514-20130731215558/@comment-4754162-20130801095513

Hmm, both of you could be right there, I did not relate the matter to those two incidents back then. I may have spoken too soon...

About Shanks blocking Akainu, what I had in mind were "Shanks imbued sword with busoshoku haki in order to withstand against the heat of the magma fist" and that's all. I did not see past anything else, certainly did not cross my mind Coby's foaming and fainting could have been Shanks doing (Haoshoku).However does that imply Shanks can't control his Haoshoku haki well enough that it accidentally affected the nearby Coby, or Shanks intentionally targetting Coby with it?

About Shanks vs Whitebeard, again that idea (Haoshoku) did not cross my mind at all, I thought it was a form of Busoshoku haki of sorts.