I finally had some time to paint the entire crypt this past weekend. While its finished I may add a few more things to it on the big night such as a light inside of it and a fog machine if I can make it fit! In the meantime Check out the video below and some pics. If you want to see how it all works check out my other blog entry here for a video of the inner workings!
Eerie Acres Cemetery 
I love this prop, do you have construction details available? Thanks
Thanks!!! I didnt go too much into detail but here you can see a better look at the inner workings of it and how I made it. Hope this helps if you have more questions just let me know!
https://eerieacrescemetery.com/2013/04/15/my-animated-crypt-work-in-progress/