In rural America, where trees fall down or line 'whips'
and linemen are many miles away, they use a novel
fusing system - a bank of three fuses in canisters.
When the fuse blows the canister explodes away
from the pole and pushes up the next fuse.

Any chance of an URL? As a fan of all things high-voltage... I Googled
a bit but couldn't find them yet...