Let me introduce you to my 'bad boy' winch!
Inherited as part of a misfit formula package many years ago. With the gear reduction and the lever-arm of the handle, it's fair to say you could very comfortably downhaul until either the sail, mast, mast base or pulley breaks!

(No, I've never done this!

) It is, after all, designed to haul power-boats up onto trailers!