Last year, I posted a link to instructions on making yourself a flame thrower. Here’s another site with different instructions, in case you want to do it yourself.
I think I’ll just stick with making my own marshmallow gun. Otherwise I’ll be setting myself on fire.
The site that hosts the marshmallow gun instructions is pretty interesting; it’s a collaborative how-to site, where you can upload your own how-tos with instructions, and comment on other peoples.