The instant I read the brief I felt that an abstract zebra was the solution.

The zebra is an energetic animal after all, right? The mark, A zebra head+neck is used to communicate energy by the posture. Neck up, mouth slightly opened - just like a horse standing on two legs. Dinamic, right?

The ideea was to finish the shape of with a lightning in the lower part but as I drew the sketch, what came out was a flipped "z" that sort of looks like a leg (again, dinamic energy) and maybe a little with lighting.