Long story short...I find myself about to do some (theatre) rigging. I'm a climber and have some gear and have seen the riggers with their stuff. Took the time to get some 'new toys'... a Chest ascender and a double pulley.

When up on the 'grid' (theatre reference) you need to haul the chain up about 100 feet. the pulley and ascender make it possible for one person to haul it up and the ascender prevents it from dropping back down.

Thinking about this, I thought why in the world haven't I had this for years. It is JUST the type of thing to have for emergency prep! And with a second pulley (and enough rope) and easy mechanical 3:1 advantage! Seems like the type of thing other might be interested in. No power required and it would allow one person to haul/lift loads to a height MUCH more easily.