How to cut a glass tabletop - GIF

[mklotz]

A good deal of the hocus about glass flowing arises from the observation that many cathedral window panels are thicker at the bottom than the top. This seems to indicate gravity-induced "flowing" until you realize that just as many panels are thicker at the top than at the bottom. Then there's the problem of all that ancient Roman glass that, despite sitting around for millenia, still hasn't flowed.

For a more detailed discussion, read what the Corning Museum of Glass has to say about it...

https://www.cmog.org/article/does-glass-flow

That said, my great uncle used to do all the glass work for a major hardware store in Allentown. My Dad and I often visited to watch him work. He frequently spoke of the need to make the break quickly after scoring the glass. I'm inclined to believe that his concern (and that of other glass workers apparently) was genuine but due to some other physical effect than the glass "healing".