Thanx for the kind words everybody!!
Slimy, yes it is pneumatic. It opens pretty fast and closes pretty fast. I can take some pictures if you would like of the insides. We were running outta time to finese the pop up but you should be able to come up with something lol. In my photobucket account there are a few pictures of the control board my fiance made. It controls all of our pneumatic props. We only had 3 but this was our first year for pneumatics so I think we did pretty good