🚀 go-pugleaf

    Prehaps the most dramatic mini-bomb that I've made out of parts you
can buy at radio shack was a light-emitting-diode that I dipped under
liquid nitrogen.  Under liquid nitrogen,  you can operate yellow and
green LED's continuously at up to about 9 volts.  When you do that,
there are several distinct voltage levels where power consumption increases
by three orders of magnitude or so and the colors change.  Trying it
with a red LED the first time,  I blew it apart,  cracking the case and
vaporizing/fragmenting the actual semiconductor inside.  The burst sprayed
liquid nitrogen over the table which sizzled for quite a while.