Ever feel the need to combine the intimidation of a big-ass cannon with the utter laughability of a scooter?
#2.
One-Wheel Tank/Ball Tank
The look and aiming ability of a testicle.
Enter Big Dog, the U.S. Army's modern prototype robot-mule, currently being tested in Afghanistan.
4.
Flying Aircraft Carrier
The "XF" stands for "This plane looks like a turd."
Hitler looked at the package of bad assery, and decided that the whole thing just wasn't quite crazy enough. And so the Nazis decided to spice things up with a bunch of ramjet engines.
Push-mower blades or not, enemy soldiers will shit at the sight of this crazy bastard coming towards them. And then, you know, step out of the way.
"Damnit, they found our one weakness: Anything that isn't snow."
Sometimes wheels just aren't cool enough for a military vehicle. Tanks have treads, hovercraft have... hoverers and the corkscrew tank screwed.