Ummm....that wasn't cutting glass, it was fracturing it.
The breaks were not straight. You will get the same results with "cutting" above water.[/QUOTE]
Wrong.
I have been working with glass since I was a kid, 21 yrs. total work time.
You try that above water, and you get a hand full of broken glass, first "cut".
That was what is referred to as "Double Strength", twice as thick as what is in a picture frame.
I see your point about the cut not being very straight, but it was due to the length of the sissors, not the method. If his sissors were about a foot long, where he could have made one cut through the glass, it would be straight.