Kraemer devised what he called Battle Action Tanks. These were small, engine-powered four-wheelers with a protective chassis built over the driver’s seat. A cage crafted from chicken wire allowed people to see out of the camouflage-colored body. Inside, a joystick triggered a series of tennis balls, which shot out of a custom-made cannon at an absolutely ridiculous one hundred miles per hour, allowing the drivers to fire upon one another.
