A stream near a beach gets dammed by the sand each year, building a reservoir of millions of gallons of water. By digging a trench in that sand, these guys create great waves of fresh water rushing into the ocean.

So that's what they mean when the flood gates open.

Did a Mountain Dew factory dump its waste into the river?

I can't believe this truck driver manages to get out of this predicament.

You better wear a helmet when going down this river because you might take a flying fish to the head.

He almost made it...well, not really.

This dude guns it to get over the river but then crashes head on into the tree.

An eagle swooped down and stole this man's fish and stripped his reel of all his line.

The instructor isn't supposed to fall out.

All while a crew member was standing on the tracks filming it.