I'm doing a video where there's a fight and there's stuff used like blinding blasters and firecrackers. I'd be able to do the blinding effect, but I'm not quite sure about the firecracker. It'd obviously be a small explosion that wouldn't do much damage. Does anyone know how to do a (somewhat) believable explosion effect? (And no, I don't have big programs like illustrator, sony vegas, the works. Mainly gimp, WMM, and Paint. Quite the low budget experiment, eh?)