(this has nothing to do with salt, but it's really cool !!)

Action:
Walking into a room, a person is startled by sharp crackling sounds at his feet as he steps on small pieces of paper. Touching the paper lightly with a meter stick brings about small but sharp explosions.

You Need:
Five grams iodine; three grams potassium iodide; 20 ml. concentrated ammonium hydroxide; filter paper; funnel.

Why:
Nitrogen triiodide when dry explodes with the slightest disturbance.

How:
Stir the potassium iodide and iodine together in a beaker with 5 ml. of water. Add the ammonium hydroxide while stirring until no more precipitate forms. Filter and spread a thin layer of the wet solid on several filter papers. Break the filter papers into many small pieces and allow to dry for several hours. On drying, the paper is extremely sensitive to touch and will explode violently with the slightest disturbance.

CAUTION:
The compound nitrogen triiodide can be safely handled when wet. Spreading a thin layer of the wet material on several pieces of filter paper lessens the violence of each explosion. It is not a powerful explosive, rather a sensitive one. The touch of a feather can set it off.
UNDER NO CONDITION ALLOW ANY SIZEABLE QUANTITY OF THE DRY MATERIAL TO ACCUMULATE.