“The US Army will be testing a new type of reconnaissance robot designed to jump over walls and through windows, without putting soldiers in the line of fire.

Dubbed the Sand Flea, the four wheeled device is about the size of a shoebox and weighs roughly ten pounds, and is capable of jumping up to 24 feet. The robot uses a piston built into its base, powered by an unspecified fuel oxidizer, to get airborne and can be aimed by changing the tilt angle and direction of thrust.

http://www.theregister.co.uk/2011/11/10/army_jumping_robots_afghanistan/