We volunteer for a haunted hayride every year and I think we have reached our limit for ideas

This year, our pavilion will be the first one people see as they go through the park. The outside of the pavilion is usually covered in black plastic all around and the "scene" is inside the pavilion as they drive by if that helps any.
We have done the morgue thing, the laboratory, the cemetary, diner, et al.....two ideas have come to mind so far, a funeral service or a dungeon, but I am not really crazy about either one.
Any help would really be appreciated!!! I do have a pic of the pavilion if that would help any!