Haunted Mansion Pop Up Ghosts

I want to get started working on a Haunted Mansion pop up ghost replica, like the many that popup in the graveyard scene. However, I can think of a few ways to do it, I was curious if anyone knows what they actually do at the Manion (for authenticity)? I was thinking of either doing a scissor-lift controlled by a pneumatic cylinder, or possibly just using a longer stroke. Any input would be appreciated! Thanks!

You get a peek at the prototype mechanisms around 1:57 here: https://www.youtube.com/watch?v=KrMAV71wYiE