[ Cheers and applause ]

-Nice to see you, buddy. Thank you.

Kevin -- Kevin, welcome back to the show.

It's always good to see you, buddy.

-You, too. -What are we doing first here?

-Do you like fireworks? -Yes. We all do.

[ Cheers and applause ]

Yes, of course!

Do you like s'mores?

-Do I like s'mores? Yes! Of course.

-Okay, we're gonna combine the two.

So, go ahead, and -- You got those on?

-Yes. It's great. -Oh, you look very cool.

-Thank you. -You look like the Terminator.

-I'll be -- No, I won't. I won't say that.

-Yeah. [ Laughter ]

So, I'm gonna ask you to hold the s'mores.

-Okay.

-And I've got the marshmallow here.

So, what we're gonna do, I have a sparkler back here.

-Uh-huh. -Okay, so I'm gonna

light the sparkler, and I'm gonna use it

to roast this marshmallow.

So, this is a titanium sparkler,

so it reaches about 600 degrees Celsius,

or if you're in to Fahrenheit, it's over 1,000 degrees.

-Yeah, I'm into Fahrenheit. -Really, really hot.

So it should be able to -- [ Laughter ]

Yeah, yeah. Me too. Me too, man.

So it should be able to toast this really well done.

So, are you ready? -Yeah, let's --

-All right. [ Lighter clicking ]

Here we go.

-This is fantastic.

This is perfect to do in the summer.

-It's about 8 feet tall, give or take.

[ Audience "Oohs" ]

-[ Laughs ] Yes! Yes!

That is the way to do it right there.

Look at that -- perfectly done.

[ Cheers and applause ] -Okay.

So, now, do you want to get a s'more?

'Cause I'm gonna get the popcorn.

-Yeah, I'll get a s'more ready to go there.

Here you go. -We wanted to have enough so.

-Perfect, thank you very much.

-Here, you want to -- -Just put one on top of there.

-Yeah, yeah. -Yeah, that's perfect.

Thank you, Kevin. -There you go.

-Wow, you really did it perfectly.

-Don't eat it. It's full of titanium.

-Oh, thank you! [ Laughter ]

Appreciate that. Thank you very much.

I'll have one of these. Can I eat that?

-We have some more sparklers -- You all right?

-Yeah, I'm not eating anything.

-Did you eat a plain, raw marshmallow?

-I did, but, yeah, that's -- -I think that's safe.

-Okay, I didn't come to rehearsal.

-All right. [ Laughter ]

That's okay, that's okay.

So, have you seen --

There's a movie called "Titanic" that's about this boat.

-No spoilers. -Okay, yeah.

[ Laughter ]

-That's more than enough. -The "I'm flying" scene,

where Jack and Rose are on the bow of the boat.

and, you know, there's beautiful music playing.

-Yeah, yeah, yeah.

-And he asks her, "Do you trust me?"

And what does she say?

She says, "I trust you, Jack." Right?

[ Laughter ]

-Yeah, yeah, yeah. This is unbelievable.

-Do you trust me, Jimmy?

-I trust you, Kevin.

-We're gonna re-create the scene, all right?

So I need your arms out at a 90-degree angle.

-Oh, my God.

-Imagine you're looking out at the beautiful ocean.

A researcher's been deceived by a woman, an old woman.

[ Laughter ]

Okay. -That's right.

-It's "Titanic." -Yeah, of course.

-Okay, ready? Light the titanium.

[ Cheers ]

-Wow!

Yes!

♪ Near, far ♪

♪ Wherever ♪

That was unbelievable.

-How are you doing? -I'm great.

I'm not on fire, am I?

-How's your heart? Did it go on?

-My heart was gonna go on. -Okay, good, good, good.

So, we were able to do that. So, why didn't it burn you?

-I don't know why.

-There was not enough heat energy

in a little tiny spark to burn your skin.

-Because it did the marshmallow. -Right.

-So had my hands been closer to it?

-Right, because heat is a product of an object's mass

and its temperature.

So a larger object like the marshmallow,

with all that heat concentrated on it, cooked the marshmallow.

But just a small amount of heat on your skin

didn't hurt you at all. -Fantastic.

-But don't try this at home. -No, no, no.

Do not try that at home. -Yeah.

So, I was a pinewood derby champion...

-Ha ha! Nice. -...when I was a kid.

Thank you very much. [ Cheers and applause ]

Thank you very much. -Yeah.

-So, we have some pinewood derby style racing cars here.

But because -- Come on over here.

We're people of science, so we have some little

CO2 cartridges in the back to power them.

So, what we're gonna do is, I'm gonna --

Put your hand there. -Yep.

-And you want to pull out the pin,

but don't let it go until I say so.

-Okay, sure. -So on the count of 3, let go.

All right, ready? -Yes.

-Three, two, one.

[ Gas hisses ] -Whoa!

-Awesome! -Fantastic!

Can we see it in slow motion? Awesome!

You got me. You took me.

Yeah, you're the champ right there, bud.

-That's okay, that's okay. [ Applause ]

Okay. So, I know you like racing on the show a lot.

-Yeah, I do. -Wouldn't it be cool

if we had human-sized versions of these sort of cars?

Wouldn't it be cool? [ Cheers and applause ]

I agree.

Tariq, do you want to race against him?

-I thought you'd never ask. -Come on down.

[ Cheers and applause ]

♪♪

-Really? -You're gonna want to put on

these gloves 'cause it's gonna get cold.

-Really?! -Oh, now it's getting serious.

-All right. -What do we do?

-Follow me. We're gonna go out into the hallway.

-All right.

-All right. -You mentioned something about

the 50th anniversary of the Moon landing?

-Right, right. And so, pretty much,

this is the same way that, like, we move objects around in space.

So, it's a large, you know, throwing mass behind a craft.

Right? Moving it in the opposite direction.

So, pretty much what we're gonna do is the same thing.

So, down here, we have two karts that have been modified,

kind of upscale from the pinewood derby type cars.

-Oh, my gosh. Yes!

-Pick your cars. There you go.

And you've got helmets to put on.

-I like to make a choice.

-Now, these red tanks are fire extinguishers, right?

And they're CO2 fire extinguishers

that have been modified to really allow

all the pressure to release.

And we should be able to get a nice propulsion forward.

So once you're ready, we'll begin the race.

Now, you want to go down the hall, around,

and back into the studio,

and the first one to the finish line is the winner.

-You ready? -I'm not answering that.

Let's go. -All right, three, two, one.

Ready, set, go!

[ CO2 hissing ]

[ Cheers and applause ]

♪♪

-Whoa-oh-oh!

[ CO2 hissing ]

[ Cheers and applause ]

[ Bell dinging ]

[ Cheers and applause ]

[ Laughing ]

-You sprayed me with smoke! -Smoked you, man!

Smoked you! Smoked him!

[ Cheers and applause ]

Kevin Delaney, everybody!