Trawling through the water with a magnet, schoolboy James Cork had only expected a modest haul of scrap metal.
But, last week, the 16-year-old from Somerset stumbled across a rather more shocking discovery – a hidden cache of 40 deadly weapons.
The arsenal of rusting and grubby guns dating back to the Second World War included a Browning .50 machine gun, which could take down a helicopter, and an M16 assault rifle.
An expert has suggested the guns may have belonged to the IRA and could have been dumped when they were meant to be declaring their arms in 2001.
The teenager from Street had taken up the unusual hobby of magnet fishing six months ago, but had only managed to salvage the odd bit of scrap metal.
But while combing Greylake on the Somerset Levels with a rope and a strong magnet tied to the end, he and a friend suddenly came across a 40-strong haul of terrifying weapons.