approximately 1990, a movie featuring some kind of inn or boarding house where guests are crushed in their beds by a platform full of boulders hidden above.  As they sleep, the platform is lowered by the owners, using a contraption of chains and pulleys.  In the morning, the dead folks are set at the kitchen table for breakfast.  Later they are dropped into a pit or well and covered with lime.

The only line I remember was the owner telling his wife, “You have no idea how much lime it takes.”