[Jack Hydrazine]

I remember when my HS chem teacher on the first day put metallic sodium in a beaker of water. (Lights were turned off at the time.) It kind of sat on top of the water and burned a bit but it started making a whistling noise. The noise continued up in pitch until it exploded sending burning pieces of sodium every where!

Fortunately we were all sitting down in our seats. She only had a light burn on the arm from a small piece of it.

I’d love to see that again!

[sharkhawk]

I remember when my HS chem teacher on the first day put metallic sodium in a beaker of water. (Lights were turned off at the time.) It kind of sat on top of the water and burned a bit but it started making a whistling noise. The noise continued up in pitch until it exploded sending burning pieces of sodium every where!

Fortunately we were all sitting down in our seats. She only had a light burn on the arm from a small piece of it.

Our honors Chem teacher did the same. Had a yearly party for all of his students for years, really got you into Science.

[Hoodat]

I remember when my HS chem teacher on the first day put metallic sodium in a beaker of water.

Those were the good old days. If I had been able to get my hands on some nitric acid back then, I'd be dead.

[Salgak]

I remember. . . way back in 6th or 7th grade, the Science teacher poured a test tube full of purple Potassium Permanganate crystals into a beaker half-full of glycerin.

In about thirty seconds, there was a 10-foot or so pillar of fire coming out of the beaker, lasted 15-20 seconds. . .

[Carriage Hill]

Here ya go:

http://www.youtube.com/watch?v=LM-93gBZvio