When Wallace and Gromit get to the the maze (where
the guards are located) in Act 4 Part 1, go to the box at the
end of the hall in the maze. It will have a paw print. Go into
the box. You will notice a guard walking back and forth in his
area. There are two guards, and three buttons. When the guards
are not looking, press the button. If the guards see you, they
will shoot you, even if you are in the box. For this reason, if
you block his pathway he will shoot the box that you are in and
you will have to start again, and the buttons will be stationary.
Also, if they cannot see you, you can run, and not sneak. Note:
Once you are pressing the button, at the end of the maze there
will be a light blue cube. You will raise the cube if you press
the button. Press all three buttons in order to escape from the
guards.