McCullum's relief at scraping home over Sri Lanka obvious after both sides' squandering of decision reviews.
One lesson beamed out when, in the words of captain Brendon McCullum, New Zealand "got out of jail" with their one-wicket win over Sri Lanka at the Champions Trophy cricket tournament.
Treasure your solitary decision review. Carefree use by both teams meant they could not use the strategic play later, in situations which could have altered the course of the match. Howlers played a part instead.
Kane Williamson was always going to struggle to overturn a dipping full toss from Lasith Malinga. The delivery looked like it was using missile guidance homing technology aimed at middle stump. Williamson became disoriented with its flight and inadvertently ducked into it while crouching in front of the stumps.
The No3 wasn't totally at fault for his heat-of-the-moment decision. He discussed making the call with non-striker Martin Guptill who must have felt that it was worth a crack.