> One of the features of safety glass is that when it breaks there aren't (or many) pointy edges created.
Which kind of safety glass?
They were talking about windshields, those are laminated glass. That means you have two sheets of ordinary annealed glass (which DOES break into big, dagger-like sharp pieces) with a plastic sheet in between (which prevents those sharp pieces from going anywhere). Presumably, given an appropriate substrate, you could make laminate out of any glass-like sheet.
The other kind of safety glass is tempered. This causes the glass to be stressed along the edges so that when it does break, it breaks into a million tiny pieces (all of which are very, very sharp). It may also simultaneously pop, especially if hit along the edges. It's less dangerous because the pieces, while sharp, are simply too small to do any real damage even if, say, a piece explodes while you're holding it.
Source: I worked for a cut & temper operation, I've dealt with all kinds of glass.