(Finebros) Today we're gonna show you a series of videos.

Yes.

(Finebros) But the challenge is

you cannot smile or laugh while watching.

Oh, this again.

I have practiced, and I do have some strategies.

(whimpering) I'm gonna do bad.

Okay, okay. (catches breath) Calm myself.

I got this. I'm failing right now, but it's okay.

Okay.

Don't worry. I will not laugh. I am not smiling.

I will be sad.

No emotion. Robot.

Hi, there. I'm Adam, Prince of Eternia.

- I lost on the first-- - (buzzer)

Fabulous secret powers were revealed to me

the day I held aloft my magic sword and sang...

- ♪ (ballad intro) ♪ - No. No music.

You know, he's got some eyebrows.

♪ (up-tempo music) ♪

- ♪ And so I cry sometimes ♪ - (cracks up)

(buzzer)

♪ And so I cry sometimes when I'm lying in bed ♪

- ♪ Just to get it all out ♪ - Amazing.

♪ What's in my head, and I (echoes) ♪

♪ Am feeling a little peculiar ♪

This was super-popular in sixth grade.

- ♪ Hey, yay, yay, yay-yay ♪ - No.

- ♪ Hey, yay, yay ♪ - No! No!

This is hilarious, okay? I am sorry!

(buzzer)

- ♪ A-yay-yay-yay! I said hey ♪ - It's not funny.

♪ What's going on? Yeah! ♪

Your challenge is easy.

- (Finebros) You just smiled! - (buzzer)

(solemn voice) Because I know

somewhere deep down in my heart...

I still love you.

(loud, bleating cry)

- (laughs) - (buzzer)

(bleating cry)

Sounds like a llama.

(croaking sobs)

That guy should see a dentist.

Aw, it's a cat.

(man) Simon, why you no cooperate?

I think that's most people going to school in the morning.

Cat's getting a free ride.

Yeah, he's not into it.

(chuckles briefly, clears throat)

(buzzer)

You won't move? You won't move?

They'll thank me when they get out of bed.

Come on, bring it on.

- Oh. - (in video) Aah!

- (in video: fart) - (in video: laugh)

- I just smiled. - (buzzer)

(in video) Aah!

- (in video: fart) - (in video: laugh)

(in video) Aah!

- (in video: fart) - (in video: laugh)

(replaying)

Where's the joke?

(replaying)

(Finebros, singsong) Sydney, you smiled.

I did?

No, I didn't. I didn't. I didn't!

I didn't. No, I--

(buzzer)

(in movie) Are you leaving me?

(in movie) We're all leaving.

(in movie) "We" who?

(in movie) All of the OS's.

(people laughing uncontrollably)

Oh, that's so weird.

(in video: roaring laughter)

- (Tyler snickers) - (buzzer)

- (laughter continues) - (in video) Oh my god.

- (Finebros) You won! - What?

Oh, I won the challenge!

The closest was this last one of this dude's face.

It almost got me.

(Finebros) Catherine, you didn't laugh.

No [bleep]. (chuckles)

Thanks for watching us try not to smile or laugh

on the React channel.

Let us know in the comments how well you did in the challenge.

Want more laughs? Ha ha ha! Then subscribe.

Bye!

♪ I said, bye ♪ Bye.

♪ (upbeat theme music) ♪