I have two jumping spider pneumatic props for sale. Both come complete with spider, lifter, controller board, and remote sensor. Basically, just plug it to 110VAC and hook up air (60 to 80) PSI, and enjoy. These props were used for haunts this year and show no wear or any damage - like new. These are prototypes. Both blow air at the ToT.

Greyspider, $700 (triggered by sensor) + shipping and handling
http://www.youtube.com/watch?v=2tRC6i35ciU

Brownspider, $750 (comes with a trigger/relay 110VAC outlet) and can be triggered either by remote control or sensor + shipping and handling.
http://www.youtube.com/watch?v=5g2oaLJiHgM

For more information, please contact www.graveyardskulls.com