Metal detectorist "Iron Mike" finds all sorts of interesting things, like this anti-tank mine among a treasure trove from the Eastern Front of World War II.
They were initially told they could film the detonation carried out by the fire department, but in the end they had to do it from a safe distance (skip to 16:50):
The found lots of other stuff, so check out the full video.
As far as the term "detectorists," the title honors the wishes of Detectorists, a show worth a watch.
• Found a WW2 anti-tank mine, it went BOOM! (YouTube / Iron Mike Metaldetecting)
