The scam...

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Okay we have:
1.) A tree knocked over across the road
2.) A pipe torn from the ground and spewing water
3.) A tipped over Ice Cream Truck
4.) A canoe
5.) Trash and other debris streaming out of someones destroyed house (mainly the back door)
6.) Trash and garbage leading down the alley
7.) Nazz: beaten up, hair shaved and horrid looking, and inside a box with a star on it
8.) Kevin: Beaten up, torn clothes
9.) Johnny: Bear trap on head
10.) Plank: Broken in several places and chipped
11.) Rolph: Shirtless and a chunk missing from his body (most likely a bitten off) and a lump on his head that is also 'bitten' along with his arm.
12.) Sarah and Jimmy: completely oblivious to everything that happened.
13.) The Ed's: Scared *beep* because somehow this is all connected to them.

SO, here's what happened:

Eddy was inspired to make his own theme park after recieving his brother's Mondo A Go-Go postcard in the mail. So he started with gathering supplies needed to create roller coasters, they also gathered animals they found in the Peach Creek Forest and from Rolf's house. After that, they found that Nazz was interested in show business so they hires her to be an assistant in a magic show. Meanwhile, Kevin and Rolf decide to try out this roller coaster after Johnny tells them how awesome it was. (because plank's love for rides led Johnny to going on it.) So as Nazz was getting fitted into a box that was made for her to disappear in, Double D decided to give her one final touch up on her hair before he started the show. However, he saw that one of the raccoons that they collected for the petting zoo had escaped. He got nervous but continued on Nazz's hair. The raccoon made its way over and and started sniffing Double D's leg. Double D is now scared to death but is trying very hard not to show his fear in front of Nazz. CHOMP! The raccoon bites Double D's leg. YOUCH! Double D screams and accidently shaves most of Nazz's hair off. She screams and takes off running while yelling and crying. She isn't watching where she is going and runs onto the roller coaster track just as Rolf, Kevin, Johnny and Plank are coming down. They slam into her and fly off the track and fly straight through someones house and shoot through the back door, taking much debris with them. Everyone is ejected from the roller coaster cart. Rolf lands in the petting zoo and is brutally attacked by the animals. A rabid llama bites a chomp off his torso, he hits his head on a rock and gets a huge bump on his head, the rabid llama bites that too. Kevin hits a tree and is flung back into the street where he lands on the windshield of a passing ice cream truck. The ice cream struck swerves off the road and through someones yard where it hit the tree and knocked it over. The tree fell on a the mechanical T-Rex that The Ed's used in there time travel scam. They had rebuilt it for a ride in the amusement park. The tree falls on it and activates it. Johnny, Plank, Rolf, Kevin and Nazz are sucked into the machine from underneath and spat out of the mouth (Johnny's big-ass head took the teeth of the T-Rex with him), they land in a stream that The Ed's made for a canoe ride. Hence, the pipe pulled from the ground, they used it to create a stream. The kids land in a canoe on this stream. Ed runs over to help and dives into the stream causing all of the water and the canoe to splash out and land in the neighbor's yard. When the Ed's realize what has just happened, Eddy panics and tries to stop the kids from the impaling them. He runs over to the T-Rex with Ed and orders Ed to knock it over. He does and it lands on the kids and EXPLODES. (hence, the absence of actually seeing the T-Rex). The Ed's take off and the movie begins from there!
And Sarah and Jimmy don't notice because Jimmy is singing Hannah Monatana songs for sarah in a 'pretend concert' and the microphone and speakers are turned up REALLY loud.

And thus, we have the scam.