Ya I know Ive made a few of those co2 bombs and they are loud as balls. It sounds like a shotgun firing or something. I make them all the time out of little shit too like pens, or led pencil refill things (the little holster that has like 10 peices of led in them). If your brave go with a 12, 16 or 20 oz. co2 though...would be interesting.