i wasnt sure where to post this question. I want to build "comets" in my class room using dry ice. im sure a few of you have seen this demo before. however, i want to use a blow dryer to warm it and to also create a stream of air so we can see the "tail" of the comet. im also hoping that the heat from the dryer will create little jets off our comets. may seem like a silly question or concern, but is there anything i need to worry about? its not going to explode or ignite, is it?