Exploding Glass: Rupert's Drop - Museum of Glass

IF you breathe that in you get super powers

Its a good way to make powdered glass, maby for sandpaper or something, or remelting.

my town is named Princ Rupert.

seventeen ( because I count like a retard)

That'd be an awesome and easy way to create frit. :D

What occurs is that the exterior of the glass cools quickly whereas the interior of the glass cools more slowly. When the interior cools it pulls on the top of the drop so that it becomes more compressed which adds strength to the glass, however, this cooling also has the complete opposite effect on the tail. SO when the tail breaks it causes the entire glass to fracture at more than 4000 mph, hence the explosion. Its all about stresses and tensions in the structure of the glass itself.

Jeez, I could've copied wikipedia too.

I suppose I could have as well. But seeing as no one else was answering the question I figured, being an experienced gaffer, I would explain the phenomenon.

would the same happen with borosilicate?

Obviously not