Spider is on a bungie cord and when the switch is activated it drops down on patrons! Designed to slip over 2' x 4' wall units, and has plugs that activate when spider drops. You plug in your own lights and boom box to heighten the impact. Very durable and effective. Requires 100 psi air compressor, not included, and regular A/C power. Must ship by truck. http://www.youtube.com/watch?v=f6VQjCijlyM
