I thought about this idea on a rainy sunday morning while I was making a coffee. (there was a swiss army knife in my kitchen) by lunchtime this was finished except for the soldier. the original design just had an open manhole but after leaving it for a day I added the little guy and sent it in. One of those ones you dont have to think too hard about thats why I think it was pretty easy to resolve the design, it's one my favourites too.