If New Zealand had read their history books, they will have known Nepal can bite at age group international cricket.
After all, the young men from the Himalayas toppled New Zealand in the plate final of the under 19 World Cup in Colombo in February 2006.
They had form for this sort of thing; and they knew their back story.
"We were definitely aware of our last win over New Zealand," Nepal's manager Sudeep Sharma said of the one-wicket win with two balls to spare 10 years ago.
"The boys were really motivated by that win in 2006.
"We want to keep our record intact and give respect to the boys who beat New Zealand that time.
"This win is just fantastic. We are really excited."
In Fatullah, Bangladesh early yesterday Nepal bowled New Zealand out for 206, for a 32-run win, amid scenes of unbridled jubilation.
Only opener Glenn Phillips with 52 and Dale Phillips with 41 made much headway.
Glenn Phillips and captain Josh Finnie put on 72 for the third wicket but steady falling of wickets undid New Zealand.
When Dipendra Airee's throw from the deep extra cover boundary cannoned into the stumps to run out Dale Phillips out, that was that, the last three wickets going for four runs.
In the previous over medium pacer Airee had dismissed two batsmen. Talk about a match-swinging performance.
That 2006 team included future internationals Martin Guptill, Todd Astle, Ronnie Hira, Tim Southee, Hamish Bennett and - batting at No10 - Colin Munro. It inevitably raises that old fun topic: how many of the current under 19s will kick on to higher honours.
This loss will hurt, but if they underestimated the Nepalese - and deep down only they know that - they have learnt a tough lesson.
Nepal won the qualifying event in Malaysia last year, which suggested they were not total lightweights.
New Zealand now face India in Mirpur tonight and Ireland on Monday night, back at Fatullah.
Finnie acknowledged New Zealand his side messed up what should have been a comfortable run chase.
"We made the target more difficult for ourselves," he said, aware his team face the grim, not to say embarrassing prospect of missing the quarter-finals.