Pakistan appealed and reviewed the 'not out' decision, which was subsequently reversed by television umpire Ian Gould.
Gould presumably saw something beyond the capabilities of the footage. Snicko showed the noise of the ball grazing near Williamson's upper right forearm, but Hotspot indicated no incriminating contact with the glove or bat. The decision made it worth pondering whether 'benefit of the doubt' still exists in the game's lexicon.
Ross Taylor entered and wasted no time gorging on the Pakistani bowling, throwing them off stride.
The No.4, who is due to have an operation to remove a pterygium on his left eye next week, had no problems with the visitors' bowling eye chart.
He carved six boundaries between third man and cover, racing to 29 off 20 balls. People will be queueing for his brand of eyedrops.
New Zealand brought Matt Henry into their side for the injured Trent Boult with the fit-again Mitchell Santner replacing Todd Astle.
Pakistan opted to rest leg spinner Yasir Shah and left-armer Rahat Ali in favour of four specialist pace bowlers with Wahab Riaz and Imran Khan coming in. Mohammad Rizwan replaced the absent (and suspended) Misbah-ul-Haq.
Rain arrived 15 minutes before the scheduled lunch break, precipitating the need for full covers as the players exited.