Have you ever seen a dolphin stampede? That's what it's called when anywhere from hundreds to thousands of dolphins form a "super" pod that seems intent on going somewhere specific and getting there fast.
I've never been fortunate enough to experience this myself, but lucky dovethree did when just such a pod surrounded their boat on Oct. 23, 2011 in Puerto Penasco. This is the video they shot.
(Hat tip to HAPPY for his comment that turned me on to this video.)
Don't you wish you were here?