Arney, you probably didn't think of that because you're not stupid enough.

A plastic cart? Plastic... the stuff that shatters when crushed?

What's the point of protecting your head when the entire rest of your body is stretched out, crushed under falling debris?

Personally, I would try to get to the end of the aisle. Upright or tipped over, curling up at the end of the shelves should give more support, even if the roof collapsed. At least you would have a chance.

And if you're in a Big Box store, most of them are tilt-up, the second-worst type to be in (A-#1 worst being older brick/masonry). And don't you love how most of them don't have long straight aisles anymore?

Seattle Office of Emerg. Mgmt. : "Older brick buildings (unreinforced masonry) and tilt up construction is the most vulnerable."

Sue