I taught Industrial Arts way back when and I taught a JrHigh Technology ed. course and we talked about rockets and other things dealing with how science and math are used in industry and we had a model rocket building time, I taught my students that you can glue all of your fins on in a short time if you use a microwave. Microwaves are often used in industry to dry or set up glue. I showed them that you would put a good bead of glue on the body of the rocket and stickthe fin in it and line it up real nice and stick it in the Micro wave and nuke it for 10sec and the glue would be dry but not quite set. Once the glue cools it is just about done it should set for about a day to really setup, but a person can glue 3 or 4 fins on in about 10 minutes. WELL, We had finished and on the day of flight, one of my illustrious students was all ready to go, engine in and he brushed against another student and busted a fin off. SOOO, he grabs the glue and heads off to the microwave stand and glues up the fin, and stuffs it in the Microwave and presses the button for the requisite 10 seconds and after about 1 the engine ignited and shoved the nosecone up into a corner as it tries to burn a hole in the side of the unit. Of course we all know what comes after the propellent charge, but the smoke and then wait for it, the ejection charge, pop and it all blow out into the microwave. My illustrious student, desireing to save his lovely rocket, decides to open the microwave instead of taking the whole enchilada outside like Mr Williams is suggesting, very LOUDLY by the way. This releases all the smoke out into the classroom instead of leaking sloowly like it was at first. I was saved a trip to the school by our local volunteer Fire Dept, because this was not the only time smoke had come out of my classroom or a classroom I had been in, and the teachers and students knew enough to check if I had everything properly under control.