Overall

Vision Vision

Originality Originality

Technique Technique

Impact Impact

Vision: Once again, we get a reminder that Rainbow Dash is a fairly competitive young mare who, if you'll forgive the pun, likes to make a splash where ever she goes.Originality: The Sonic Rainsplash is a fairly humorous extension of all of the other Sonic Rain-something-or-other manoeuvers we've seen over the last few months.Technique: The silhouette of Derpy in the last panel sells the whole thing a lot better than a close-up of her would have. We can imagine her having any facial expression we want instead of being tied down to something.Impact: Aside from the crater at the bottom of the pool, the main source of impact is how funny this is. Sure, somepony is going to be feeling that for the next few days but Pegasi are fairly resilient.