65-year-old Denis Duthie, a Western Institute of Technology teacher from Taranaki was throwing back a few in honor of his parents' 50th wedding anniversary, when his vision suddenly disappeared.
After an attempt to sleep the blindness off failed, Duthie decided it was time to visit the hospital.
Doctors there immediately suspected methanol poisoning, which caused formaldehyde to accumulate in his system, leading to loss of sight.
To prevent the methanol from further metabolizing into formaldehyde, doctors administered ethanol through Duthie's gastro-intestinal tract, but there was only so much in stock.
After the supply ran dry, a staff member was sent to a nearby liquor store to purchase a bottle of top-shelf whisky: Johnnie Walker Black.