HOT ICE!!!!!!!

Me and luke are doing an exothermic reaction which are reactions that releases energy in the form of heat. We are going to heta up water to a boiling point. When the water is boiling we added the sodium acetate until it wouldn't dissolve anymore. Next we put it in a cup and put it in the fridge for it to cool down for about thirty-minutes. After it cooled we put it in a small clear container. Then you just simply touch it and it turns into ice that will burn you. thankx and this is our reaction experimennt.http://www.youtube.com/watch?v=aC-KOYQsIvU