On May 28, 9:12*am, Art Todesco wrote:

I hit it with a
sledge hammer. *It literally bounced.
It took a lot more force to break than I
would have thought. *Once there
was one crack, the whole thing crackled
and popped until there were
little bits of glass on the tarp.

Tempered glass is funny stuff. The stuff is surprisingly tough when
you hit the face of it, but if you took a regular hammer and gave hit
it on the edge of the glass it would shatter very easily.

R