I have a question for LF about the triple haul.

I am trying to visualize it in my head when to make the last haul.

I think what I understand is that the last haul is made as the line it shooting out on the final forward cast to really make an abrupt stop to force the loop to unfurl and straighten out the loop and leader into a strong head wind??

Sorry if this seems kind of vague but I am trying to figure out when it is made and what its purpose is.