We've all had those "what if I try this" ideas. Sometimes we luck out and they work out surprisingly well. And by "surprisingly" I mean that no one loses an eye or breaks a bone. Then there are those ideas that sound really cool that don't quite turn out like you had envisioned. Like every time I think I can build something out of wood although I have absolutely no carpentry skills and I'm terrible at math.
Here's one of those instances courtesy of failblog.org.