I can't read Japanese too well, if by 'too well' I mean 'at all'. But maybe you can actually purchase this robot off their website. Note that when you park this in front of your house, your neighbor will stop blowing his leaves onto your lawn.
The Landwalker is designed by Sakikibara Kikai, and they have a video of it in action on the site.
In case you can read Japanese either:
"Control is via foot pedals. The side mounted guns are not operational Click on the image to the left for an extended movie." - PlyoJump
Landwalker Robot Vehicle: Intimidate Your Neighbors
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LANDWALKER ROBOT VEHICLE: INTIMIDATE YOUR NEIGHBORS
Published: Jan 1, 2006 • References: sakakibara-kikai.co.jp