Comes in several calibers - this one is a .45acp. This is not mine, but it is goofy enough to where if I could get one "cheap", I'd probably buy it. I'm a sucker for goofy guns.
The BFR, is a bit overkill, but not that wacky.
That Rhino is kinda cool looking. I would love to try one out.
The Duck foot is in the pre modern realm. There are all kinds of crazy guns made in the 16-1800s
These knife guns look like a bad accident just waiting to happen.
All of these fall into the Stupid goofy category. What would be the point.
My vote is for a scary 12 gauge zip gun that was used to murder an american businessman in Thailand. I saw it on one of those investigative reports type shows.
I couldn't find the exact one from the case, but it looked a lot like this:
I don't think zip guns, knife guns, pen guns, and assorted other inventions, AOWs, or disguised guns are goofy at all. I think they're all kimd of neat. I've fired a gun built into the handle of an umbrella, and seen plenty of pen and cane guns. I got to handle a hardware gun made of a big bolt and some springs and brass fittings and such. It shows the futikity of gun control if nothing else.
My vote for goofiest is maybe the gyrojet, but honorable mention to the Nambu.