And as the Grinch, it's your job

to always look grumpy and annoyed.

-Yes. -Take a look at this camera here

and give us your best Grinch.

Side by side. Yeah.

Two.

Yeah!

-That's a good -- That's a good Grinch.

[ Cheers and applause ]

So, I thought I would put your Grinch to the test

by taking you on the "Try Not to Laugh" challenge.

We're gonna take turns watching funny videos.

And you have to keep your best Grinch face...

-Okay. -...while trying not to laugh.

My Grinch resting face. Here it comes.

You can go first, actually. So...

-Okay, yeah. -I'm psyched 'cause I can laugh.

Okay. Benedict, you go first.

Ready? -[ Breathes deeply ]

Watch that monitor. Let's play the first video there.

[ Cheers and applause ]

[ Laughter ]

I love that. So I lost?

All right, here we go. My turn.

All right, good luck. Good luck to you.

[ Laughter ]

What? I don't understand what I just saw.

Wait, what did I just see? I have no idea what's happening.

- Was that ice? -That was ice.

That was someone trying to get to their car.

[ Laughter ]

I thought he got hit by the other car? Oh, my gosh.

Not what you think is gonna happen.

Why would I laugh at that?

No, no, no.

All right, so far we're zero for zero.

- Okay, it's your turn. - All right.

Whew.

[ Laughter ]

Ooh.

He did it! Oh, my God! Look at that.

He did it! That's -- That's good.

Tunnel vision. Tunnel vision.

All right. All right, here we go.

- English classical...training. - My turn. Here we go.

[ Clears throat ] No training at all.

Straight off the streets. Go on, do it, Jimmy.

Yep. [ Farting noise ]

[ Laughter ]

You had a much, much tougher challenge.

That was so straight out of the gate.

I had no idea. Ready? [ Fart noise ] No.

I wasn't ready. He certainly wasn't ready.

Wait, what? Can we see that one again?

[ Fart noise ]

[ Laughter ]

[ Fart noise ]

[ Fart noise ]

Uhhh. [ Laughing ]

[ Laughter ]

So sorry.

Whoever that is, I'm so sorry.

So sorry.

Age is not kind.

Oh, God. [ Coughing ]

[ Laughter continues ]

Oh, God.

This is the final round.

[ Laughter ]

Oh, God. Is it my turn or your turn?

It's my turn.

[ Laughter ]

We can watch -- [ Laughing ]

We can watch the video at the same time.

I don't think I can stop it. Okay.

Okay. Here we go.

Not laughing.

Grinch. Okay, come on. - Here we go.

[ Blows raspberry ] All right, here we go.

Go.

[ All chanting "We want Santa" ]

- Where is he?

[ Laughter ]

[ Applause ]

Oh, my God!

[ Blows raspberry ]

Dave, can we watch that --

that football -- -Wow.

Can we watch the football one one more time?

- The football one? -The football one.

[ Fart noise ]

[ Laughter ]

[ Fart noise ]

[ Cheers and applause ]

Benedict Cumberbatch!

[ Cheers and applause ]

Stick around -- [ Laughing ]

We'll be right back for more on "The Tonight Show"!