Probably my best one yet.

"I've done it!" Zim yelled with excitement and pleasure in his voice. He had just finished his ultimate weapon: a nuclear bomb that would take out half the planet. However he still needed one more thing to get it working.

"Gir!" Zim called his little robot.

"Yeeeeesss?" Gir asked as he poked his head in.

"I've just finished the bomb Gir, and I need your help to power it," Zim said.

They headed outside to the front lawn with the bomb, where Dib was just hiding behind a tree with binoculars. Zim didn't see this though. He was far too busy thinking about the extinction of the human race. Suddenly Chloe came along.

"Hi Zim," she waved, "What's that? An engine?"

Excellent, Zim thought, My first tool to power the bomb.

"GIR! BEGIN OPERATION FUNNY!" Zim yelled.

"Operation what?" Chloe asked. Gir jumped in front of her and started spinning. Chloe started giggling, and a meter bar on the bomb lit up. That's right. Zim needed laughter to set the bomb off.

"It's working!" Zim yelled in triumph, "Gir, keep making her laugh!"

Gir pulled his tongue and twisted it around his neck until his head flew off. Chloe burst into hysterics. She collapsed cackling as the bomb was carried away to make more people laugh.

Dib saw this and rushed over to Chloe, who was still laughing like a maniac lying on the ground.

"Okay enough, Chloe. It wasn't that funny," Dib said.

"I… can't… help… it," Chloe said in her throat.

Dib knew what this meant. Zim was going to force everyone to laugh their heads off to power that bomb. He had to stop him.

Dib rushed to the town park, where everyone was watching Gir dancing on an upside down wagon with a sign that said "Laughter accepted as payment." He rushed over to the crowd.

"Everyone!" Dib yelled,"stop laughing! That's just what he wants you to do!"

"What's the matter Dib?" Zim mocked, "Can't handle another human doing perfectly normal human things?"

"As if," Dib yelled, "You're just sucking the laughter out of all the humans to set off that bomb and blow up the earth! I'm going to stop you!"

"Too late!" Zim said, "The humans are already laughed out!"

Dib looked down. Sure enough, Zim was right. Like Chloe, everyone was lying on the ground giggling like crazy heads.

"At last, the earth will be a smoldering pile of ash," Zim laughed evilly, but then realized nothing was happening. He checked the meter bar, which wasn't quite full. Zim got an idea and looked at Dib.

Dib knew exactly what he was thinking.

"Gir!" Zim yelled, "The restraints!"

Gir shot four small cuffs at Dib, two landing on his wrists, two on his ankles. Dib was pinned down.

"I'll never laugh for you!" Dib yelled.

"Gir! Bring out the tickle maker!" Zim yelled.

Gir pulled out a feather and walked towards Dib.

"No. Please, no!"

Next thing Dib knew, he was laughing uncontrollably. The meter bar on the bomb went up higher, and higher, and higher. But instead of exploding, and taking out the whole town, it just exploded and broke.

"Nooooooooo!!!" Zim yelled, "My plan is ruined!"

He was about to bang his fists on the ground when he noticed Dib was now just like everyone else.

"They'll get better soon," Zim said, and he and Gir walked home.

THE END

There you go. Probably could have been better. Please review.