its actually a piece of scenery not a diorama, the title was suggested by my son, so the idea is to use your imagination as to what is going on and use the scenery accordingly, but on reflection the title is confusing :)
It's very nice, and I love the bloody water effect, but I don't think I really get it. Who did shoot the sergeant? Some closeup shots of key parts of the diorama might help to tell the story.