Have you ever heard of a Prince Rupert’s drop? No? That’s alright, the gentleman with the YouTube channel Smarter Everyday has a whole segment regarding the interesting drop of glass and its explosive properties — that’s right, explosive.

A Prince Rupert drop is a phenomenon that occurs when molten glass is dropped into a cold water. It forms a ball with a thin tail. As Smarter Everyday describes it, it looks sort of a like a tadpole.

Price Ruperts Drop Explosive Glass Properties Demonstrated by Smarter Everyday

Price Rupert drop (Image: YouTube screenshot)

Amazingly though, the glass cannot be broken. That is, it can’t be smashed — even with a hammer — if it’s hit on the more bulbous part of the glass. A mere tap on the thinner tail portion though will explode the glass.

Price Ruperts Drop Explosive Glass Properties Demonstrated by Smarter Everyday

(Image: YouTube screenshot)

Price Ruperts Drop Explosive Glass Properties Demonstrated by Smarter Everyday

(Image: YouTube screenshot)

Price Ruperts Drop Explosive Glass Properties Demonstrated by Smarter Everyday

(Image: YouTube screenshot)

Price Ruperts Drop Explosive Glass Properties Demonstrated by Smarter Everyday

(Image: YouTube screenshot)

Watch the amazing properties at work and learn about its composition from Smarter Everyday, but as they suggest “goggle up,” at least virtually, first:

(H/T: Gizmodo)