This is how Smokescreen and Pinkie Pie's Act of Laughter goes in My Little Pony Transformers Prime: Friendship is Magic.
[Later on in the forest]
Rarity: No. My eyes need a rest from all this icky muck.
Bumblebee: [beeps] (translation: What? Its just harmless brown stuff.)
[Rarity looks at him]
Rarity: Well, I didn't mean that literally.
Bumblebee: [beeps] (translation: Oh. Right.)
Twilight Sparkle: That ancient ruin could be right in front of our faces and we wouldn't even know it.
Optimus Prime: Yeah. Now let's keep moving.
[Rarity bumps into Bumblebee]
Rarity: I didn't see you there, my apologies.
Bumblebee: [beeps] (translation: It's okay.)
Rainbow Dash: Right here... guh...
Applejack: Oh wait, I think I stepped in something.
Applejack: It's just mud.
[They see a tree with a scary face]
[The other ponies and Autobots scream until they hear laughter]
[They see Pinkie and Smokescreen laughing at a tree with a scary face]
Pinkie Pie: [laughter] Bleh. Ooo!
Twilight Sparkle: Pinkie, what are you doing?! Run!
Optimus Prime: Come away from there, Smokescreen.
Pinkie Pie: Oh girls, don't you see?
Smokescreen: This is a little something Pinkster here taught me.
Pinkie Pie: When I was a little filly and the sun was going down...~
Twilight Sparkle: Tell me they're not...
Optimus Prime: Oh, come on.
[Pinkie and Smokescreen continue their singing]
Pinkie Pie: The darkness and the shadows, they would always make me frown...~
Rarity: They are.
Bumblebee: [beeps] (translation: So? They're just singing.)
[They continue their singing]
Smokescreen: I'd hide under my pillow~
From what I thought I saw~
But Granny Pie said that wasn't the way~
To deal with fears at all~
Rainbow Dash: Then what is?
Arcee: Yeah. Explain the details.
Pinkie Pie: She said, "Pinkie, you gotta stand up tall~
Learn to face your fears~
You'll see that they can't hurt you~
Just laugh to make them disappear."~
Ha! Ha! Ha!~
[They bounce by their friends]
Smokescreen and Pinkie Pie: So, giggle at the ghostly~
Guffaw at the grossly~
Crack up at the creepy~
Whoop it up with the weepy~
Chortle at the kooky~
Snortle at the spooky~
And tell that big dumb scary face to take a hike and leave you alone and if he thinks he can scare you then he's got another thing coming and the very idea of such a thing just makes you wanna... hahahaha... heh...~
[The scary faces on the trees disappear]
Optimus Prime: Well, I guess laughter gets rid of fear too.
Twilight Sparkle: Thanks, guys.
[They continue their journey]