Glass can be stronger than it looks - Prince Rupert's Drop - tested for strength.

[Phil Perry]

 

Full Metal Jacket projectile fired at a Prince Rupert's drop.

 

World and Science on Twitter

 

 

[Phil Perry]

Amazing what Interesting non-political stuff can be inadvertantly discovered on the interwebbythingummy isn't it ? ( Rhetorical )

 

 

[Old Koreelah]

Modern glass can be plurry tough. In motor vehicle rescue operations we learned long ago that a hammer or big rock probably won't break a window- a tiny punch in the corner will.

 

 

[Marty_d]

Pardon my ignorance... but "Prince Rupert's Drop" sounds more like a painful disease of the nether regions. Is that a specialised form of glass?

 

 

[Phil Perry]

Pardon my ignorance... but "Prince Rupert's Drop" sounds more like a painful disease of the nether regions. Is that a specialised form of glass?

Without recourse to Wikiwotsit, I guess it's a glass blowers' term for a little pearl of molten glass with a stringy tail on it. Have to be honest, I'd heard the term, but had no idea what it referred to Marty !