Hells Of The Iron Wheel And Boiling Cauldron. Hell Punishments, left side. Scene 21, Baodingshan, Dazu Just to the right of the Impaling Hell, a helpless sinner is ground to pieces underneath a heavy toothed iron wheel that looks like an oversize tea grinder; his sin was eating rabbits, like the woman seated at the table above. Meanwhile another sinner, guilty of evil speech, is picked up like a slab of meat and tossed into a boiling pot. The monkish figure at the right, in front of the three-tiered stupa, is Zhao Zhifeng; his captions advocate the pursuit of enlightenment as the best way to avoid suffering.