All aboard the Pacific Surfliner. Next stop: the Pacific Ocean.

Massive waves have been battering Southern California’s coastline, sending explosions of whitewater over the rocks and directly against the Amtrak trains traveling along San Clemente’s increasingly vulnerable shoreline.

The extraordinary conditions have been documented by Laguna Beach surfer Blair Conklin in a recent video , along with Chris Monroe, better known as BEEFS TV, whose footage captures the ocean’s relentless assault on the coastal railroad.

But perhaps the wildest perspective comes from inside the train itself.

In a viral video , a six-year-old passenger experiences the spectacle firsthand as a powerful wave crashes against the train’s windows.

Mary Neville captured the terrifying footage while filming the view with her six-year-old daughter. Then, a massive wave violently slammed into the side of the moving train.

“Of course scary, terrifying, completely unexpected,” Neville explained to CBS 8 San Diego .…