[Spridgets] Jackstands

[David Ramsey]

Who cares by the time the cinder blocks fail, you're down the road with your
new set of wheels and tires.
		Crash

Finally, don't ever use a concrete block as a jack stand. Concrete is 
very weak in tension and will fail suddenly under a relatively small 
load. When loaded on the face of the block the concrete is in tension.

Tim Collins
http://www.flickr.com/photos/12702006@N07/