Just run and enjoy the diving object.. after everything calms down a bit press the right mouse button in the main window and select "REMOVE SELECTED" from the menu this way you will create a hole in the container (by removing the selected atoms)...
you will see that the object will soon be stuck block the water from flowing.. (check the LINKS checkbox to see it more clearly). When this happens simple go in THE ACTIONS/OBJECT MANAGER select "DIVER" then from the action list select "disintegrate" or remove.. and press the doit button..
