Eighteen students twice conquered Everest in a relay challenge on two flights of stairs at the South Holland Post 16 Centre.
There were around 5,920 ascents and descents on the steps made between 9am and 1.30pm as students on the public services course set out to raise cash for wounded soldiers in the Help for Heroes recovery units.
Donations given for the feat amounted to £80 and next year there will be more events at the centre to help this country’s service veterans.
The stairs challenge was planned so there would be one ascent to the summit of the 8,848m mighty mountain.
But an accidental lapse in counting gave the students a golden opportunity to show their mettle.
Public services and psychology teacher Jody-Helena Williams broke the news just after lunch, telling students: “You have only got to do 370 more relays and you have done it twice.”
And the youngsters were more than happy to carry on.
Miss Williams said: “I have done this challenge in other places with lots of other students and none of them has ever done it twice and none of them has done it with the kind of gusto displayed by the students here.
“I am really, really proud of them.”
Student Aaron Strickland made the challenge a little tougher on himself by carrying an army burgen (backpack) that was loaded to the brim with psychology books by his friend, Curtis Wood.
The students were fuelled-up for the challenge with short breaks for paninis and drank lots of water to stay hydrated.
Everyone seemed to take it in their stride.
“Some of them were quite sprightly at the end of it,” said Miss Williams.
One aspect of the public services course looks at the impact war has upon various groups, not least the soldiers in the front line.
Films such as Haunted by Helmand and Goodbye Afghanistan brought into sharp focus the horrific injuries suffered by soldiers as a result of the fighting or stepping on booby traps or IEDs (improvised explosive devices).
Miss Williams, who joined the Post-16 Centre in January, said: “Some horrific things have happened and we decided we wanted to raise some money for the Help for Heroes recovery centres.”