PAC:
"Sometimes a weapon can have effects that are secret even from the people using it. The Parachute and Cable (or PAC) was a British weapon intended to bring down German bombers. The idea was that a cable would be lifted into the air by a rocket into the path of a bomber. The bottom end of the cable carried an explosive device, and there was a parachute at the top. The parachute served two functions. Once the rocket burned out the canopy slowed the cable's fall, and if the cable caught a bomber's wing the drag from the parachute would pull the cable across the wing until the explosive made contact and detonated. (Early versions simply had a second parachute at the bottom, with no explosive. They were intended to entangle propellers. Later variations included hanging the cables from barrage balloons.) Proponents of PAC expected Nazi bombers to drop from the skies in droves. "
from:
http://www.dcr.net/~stickmak/JOHT/jo...retweapons.htm