Empty Shed Help

Thanks everyone. I think I'm leaning towards Cinders idea of an Evil Granny scene. Sweet Granny rocking in her chair reading a book inside the shed. A monster pops up from a window and talks about what he plans on doing to the Granny. He closes the door-- Sceams, flashing lights, smoke, chainsaw noice, etc... doors open to have Granny now holding the head of monster yet still acting all sweet. With adult actors, it seems the most plausible. A Hansel and Gretal scene might be something I'll do next year as I'll have a bit of time to recruit some young looking actors.


Now in my mine shaft scene I plan on having an actor meet the guests at the entrance and say "Gee Wilakers people, we're just about to blow the shaft but I think you have time to make it. through. Once inside, the shaft will open up to a larger mine room (AKA an enclosed car port tent) and another mine shaft guy will be ready to push down on a TNT box. He'll yell-- who let you in here , it's about to blow ...and then???? I'm thinking I can have a loud bang and maybe a mummy can come out of a wall or something but the problem is scenes have to be reset every 5-10 minutes or so. There is only so much you can do to make a mummy look like it's coming to life and breaking out of an effect. Any ideas on what other effect might work in the mine shaft once everyone has been pushed to area that the TNT goes off? I searced mine shafts here for a while but most were awesome props that you couldn't go through. I realize that this will mostly be an acting scene and not really LOOK that great. A startle is what I'm after. Maybe Cardboard boxes or somethign but that would look lame. (albeit safe.)