I think a shot like this is best put in a series. You already have seen the other photos, so subconsciously you've filled in the gaps of the story. But since this is all we have to go by, we feel like something is missing.
I would post a few of the guy in action also. If anything it will help create a linear story which will put this into perspective.
BTW, I feel the need to tell you I'm a beginner, so this might not work like a charm. Its not a fact, only a suggestion.