oil and water, gas and matches, tequila and fireworks.

So you can imagine my concern when

I heard about a combination of kayaking and surfing.

[water waves]

Then I saw this and thought perhaps

I'm worrying about nothing.

And then I saw this and realized I was right the first time.

All right.

If we're going to go treating a kayak like a surfboard,

we'd better prep on center of buoyancy and hydrodynamic drag.

To remain stable, a kayaker keeps the center of mass

directly over the kayak center of buoyancy,

which is in the middle of its submerged volume.

Traveling out to sea, it helps to keep the kayak perpendicular

to the waves, because turning sideways

can mean more hydrodynamic drag and a salty roll.

When catching a wave, you must ensure the nose doesn't dig

into the water, otherwise the resulting

increase in hydrodynamic drag could produce a turning effect.

Waves can travel hundreds of miles,

relentlessly building speed and power before smashing

into your kayak, but we should be OK-- providing

we remember the rules.

[noise]

Hold on a minute, should we be perpendicular to the wave

or parallel to it?

[music playing]

Yes, it was perpendicular.

By hitting the wave almost parallel

he presents a large surface area,

which leads to enough hydrodynamic drag

to flip the kayak.

[music playing]

We are out and ready to catch a wave.

I'm videoing this just in case things don't go well.

That's a little negative.

Confident, confident.

[noise]

But well-founded.

Good start, but here the nose digs in slows down

and our friends enjoy the benefits of the turning effect.

Now these guys have got it nice and perpendicular,

minimal drag.

Like a knife through salty butter.

[music playing]

NARRATOR: Maybe it's safer to avoid all that nasty drag

and head out of the surf to calm open sea.

There it is.

There it is.

NARRATOR: Oh, look-- a delightful little fish.

[music playing]