Kings Deep had Saturday's $100,000 Meadow Fresh Great Northern Hurdles won until the Mark Oulaghan factor kicked in.
It happened in a matter of only the last five strides.
No one can put more into a horse's stamina to see out the closing stages of a race than Oulaghan.
As often as you see it - and how often was it obvious in Grand National Week in Christchurch - it comes as a surprise.
Harvest The Gold had the Oulaghan factor going for him when he and Kayla Veenedaal swept past, when the race was virtually over.