Fruit picking method and apparatus

A water cannon capable of selectively discharging a water slug to impact an object comprising a hollow barrel having an outlet disposed at one end portion thereof and a firing mechanism disposed therein, said hollow barrel comprising a firing chamber to selectively receive a firing charge of gas, a propellant chamber to retain a propellant gas therein and a liquid slug chamber to retain water therein disposed in operative relationship relative to each other, said firing mechanism comprising a firing actuator selectively movable between a first position and a second position when said firing chamber receives a firing charge of gas, said firing actuator normally held in said first position by a positioning element, a propellant flow control selectively movable between a first position and a second position and a liquid flow control selectively movable between a first position and a second position when said firing actuator is moved from said first position to said second position such that the propellant gas from said propellant chamber forces the water in said liquid slug chamber from said outlet as a water slug to impact on an object.