Abstract: A method and apparatus for fouling the rotor system of a helicopter positioned in a localized space is disclosed. One end of a long flexible line is attached to a carrier and the carrier is propelled from a launch point so as to overfly the localized space. The flexible line is progressively played out from the launch point and over the localized space as the carrier overflies the localized space. The playing out of the flexible line attached to the carrier is terminated before the distal end is substantially pulled from the launch point so that the played out line falls to the ground with one end trailing along the ground. Preferably, the end of the flexible line in the air and the carrier are attached to a parachute to slow the descent of the flexible line and carrier to the ground. A number of flexible lines can also be simultaneously played out to form a grid or net of slowly descending lines.