Andy didn’t chase after it. She was laughing too hard.

Evan laughed even harder. Tears ran down his cheeks.

What’s happening to me? he wondered, suddenly feeling frightened.

Why can’t I stop laughing? What’s going on?

Kermit grinned at both of them. That grin!

Evan laughed even harder. So hard, his stomach hurt.

Something is wrong, Evan realized. Something is terribly wrong.

“K-Kermit—why are we l-laughing?” he stammered.

Andy wiped tears from her eyes. She held her sides and laughed some more.

“Why are we laughing?” Evan demanded.

“I gave you my laughing mixture,” Kermit told them. “I put it in the orange soda.”

Evan tossed back his head and laughed. Andy giggled so hard, she choked. But she kept on laughing.

This isn’t funny. This is scary, Evan thought. But he let out a shrill giggle.

“How—how long are we going to laugh like this, Kermit?” Evan managed to ask.

“Probably forever,” Kermit replied, flashing his famous toothy grin.

Evan took a deep breath and tried to hold it. But the laughter burst out of him so hard, his chest ached.

Laughing giddily, Andy made a grab for Kermit.

Kermit ducked out of her reach and went scampering toward the fence at the back of the yard.

Evan shook his head hard, trying to shake off the effect of the laughter potion. But it didn’t help. He laughed until tears rolled down his face.

Andy chased after Kermit, laughing shrilly.

Evan followed, gasping for breath. I can’t breathe, he realized. I’m laughing so hard, I can’t breathe.

“K-Kermit—!” Evan choked out. “You’ve got to s-stop it!” A high giggle burst out of his throat. “You’ve g-got to!”

“I don’t know how,” Kermit replied calmly.

Andy and Evan laughed in reply.

“It’s awesome—isn’t it!” Kermit declared happily. “The mixture works perfectly!”

Andy made a grab for Kermit’s throat.

Again, Kermit ducked away.

Andy and Evan laughed a little harder.

Andy picked up the Frisbee and tried to heave it at Kermit. But she was laughing too hard to control it. The Frisbee sailed over the fence.

“Hey—get that back. That’s mine!” Kermit demanded.

Evan and Andy laughed.

A familiar face popped up on the other side of the fence.

“Conan!” Kermit cried.

Conan peered first at Andy, then at Evan. “Are you looking at my yard?” he asked Evan.

Evan struggled to hold it in. But he let out a high, shrill laugh.

“Didn’t I warn you last week about looking at my yard?” Conan demanded.

Evan laughed.

“Conan, give me back my Frisbee,” Kermit whined.

Conan leaped over the fence. Evan saw that he had the Frisbee in his left hand. Conan quickly hid the Frisbee behind his back.

Andy and Evan laughed. Andy wiped tears from her eyes. Her whole body shook with laughter.

“Give me back my Frisbee,” Kermit insisted.

Conan ignored him. “What’s so funny?” he asked Andy and Evan. He balled his right hand into a fist.

Andy giggled.

If we keep laughing, he’ll pound us! Evan realized. But he couldn’t help himself. He let out a loud belly laugh.

“Hey—I want my Frisbee!” Kermit whined.

“I don’t have your Frisbee,” Conan lied, keeping his left hand behind his back.

Evan tossed his head back and laughed.

“Yes, you do. It’s behind your back,” Kermit said. “Give it back, Conan.”

“Who’s going to make me?” Conan demanded in a low, menacing voice.