.. on plywood. A step above dirt. eta - plywood is probably why everything slid around and fell. Might have all move in a synchronized manner if the blocks were on the dirt. But he was only about 80mi from the epicenter, probably wouldn't have mattered anyway.
What the poor ******* should have had was that removed wheel under the axle pumpkin instead of propped against the junk heap. And never putting his head under the brake drum.
/this ought to go in the 'stupid acts / unsupervised' topic as another lesson / warning to all.