Stress: good AND bad… at the same time?

When you take molten liquid (SUPER HOT) glass and let it drip into ice-cold water it cools so rapidly that the stress is compressed into the core of the glass, making it virtually indestructible… UNLESS you find it’s weak spot!

When you flick their ‘tail’… KA! BOOM! they explode.

This process, called tempering, is what makes car windshields so strong, yet safe when they finally do break.  Why safe?  Well this way they break into lots of small pieces instead of big sharp, knife-like pieces which can sever an arm or other important body-part.

By the way, these ‘explosive’ drops are called Prince Rupert’s drops (named after a 17th-century amateur scientist.

Watch this video and feel free to show it to someone who has pent up stress that needs to be released safely… before their weak spot is accidentally (or purposefully) tapped.