Japan's Suidobashi Heavy Industry has created this monster. It's a 13-foot tall robot that shoots water bottles like rockets, comes with twin BB-shooting gatling guns, runs on gasoline and a diesel engine, and can be controlled with a phone or facial expressions.
The company warns, "'Kuratas' is an art piece. It is not a normal vehicle, so it doesn't guarantee you safety and comfort. However, it makes your dream of becoming a robot pilot comes true." (sic)
Check out this demo:
Kuratas runs on a next generation robot operating system called V-Sido, according to the video. You can operate the robot with a phone via 3G if you pay the $1.3 million it will cost you.
It goes about 10 kilometers per hour, and can be driven in low and high positions.
Did I mention it comes with twin gatling guns?
A couple of additional looks: