Well, after you bury the crank in the back yard for storage and all.......
If you don't want to do that much digging they also make great mailbox posts...the neighbors Honda doesn't even budge them!
The cranks we had bend (it was repeatable, over the years I worked at that outfit I saw 3 do it) were out of big Cummins V engines. Had them straightened and cleaned up and went back together. They're heavy enough that when they turn them they support the center of the cranks with 2 air cylinders rigged from the ceiling to keep them from flexing and causing the journal to taper.