I feel weird suggesting stuff, but... ...here are a few feeble ideas: (a) Motion - Kinda self-explanatory. No postwork, but capture the essence of motion. Make it evident. (b) Freeze Frame - Opposite of (a). Let the view KNOW you froze time and motion. (c) Sequence - Three frames that tell a story. No more, no less. Three frames. Otherwise, I think #1 above would be nice, but with a twist (like Alpha did to us a time or two): It must be unrecognizable "at first glance" but when explained later, you find yourself saying, "OH! Why didn't I see that?" OK, I'll shut up.