This is a selfmade WA for the Restoshaman's Tidal Waves procc.
It's got some animation in it.
And I have got a big hammer.
p.s. You might have to change the trigger, if you play on lower levels, as I used the spell ID for the highest rank.
Here are the lower ranks IDs:
Rank 1: 51562
Rank 2: 51563
Rank 3: 51564
Rank 4: 51565
Enjoy!