Passengers on Captain Dave's Dolphin & Whale Watching Safari witnessed the mesmerizing event.
MORE: Southern California's most famous bottlenose dolphin, Patches, returns to the coast
SoCal's famous bottlenose dolphin Patches returns
Roughly 400 dolphins were seen leaping out of the water.
Experts say the cause of dolphin stampedes is unknown.
The theory is that the dolphins may be racing to catch a food source or meet up with another pod of dolphins.
MORE: Huge pod of dolphins spotted off Laguna Beach
Huge pod of dolphins spotted off Laguna Beach
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