Holy incendiary device, Batman!

Using bats to bomb Japan, a World War II experiment.

The idea behind World War II's Project X-Ray "was that a bomb-like canister filled with bats would be dropped from high altitude over the target area," says Murdoc Online. "The bats would be in a sort of hibernation, but as the bomb fell (slowed by a parachute) they would warm up and awaken."