[EricH]

Originally Posted by slijin

As well-intentioned as this is, just how would the two wrenches contact each other while contacting the terminals? Wrenches aren't exactly as flexible as wires.

Gimme a large pair of open-end wrenches (uninsulated, naturally) and some electrically-insulated reaching devices and I'll show you. Wrenches slip, wrench ends meet, "nice" shower of sparks.

Or, the human body can conduct electricity. Two students working contact, and the resistance is low enough, not only do you have sparks, but you have two shocked students, literally.