User blog comment:AgentP/Phineas and Ferb movie/@comment-1758246-20100206014750

I'm gonna finish the second half of my idea.

A song plays as Phineas and Ferb begin working their way through the impossible tasks. The song ends when they get to the final task.

Candace and Jeremy enter a restaurant. They get seated. Spying through one of the restaurant's windows is Mandy, plotting Candace's humiliation. Cue montage of Mandy trying to do things to humiliate Candace but failing.

Meanwhile Thadeus and Thor are looking for things to do in order to ruin Phineas and Ferb's reputation. Thor points across the street, where Isabella is seen playing with Pinky. Thadeus plans on being a jerk to her to ruin her image of Phineas. Thadeus and Thor walk across the street. Isabella greets them, not knowing that Phineas and Ferb is actually Thadeus and Thor. Thadeus asks "What are you doing" in the same fashion Isabella asked him back then. She says she's playing with Pinky. Thadeus then begins being a jerk. He starts saying things that gradually makes Isabella angry. She then tells Phineas and Ferb to get away from her. The boys leave, laughing, but they don't know that Isabella is much smarter than that. As they leave, Isabella wonders why Phineas and Ferb weren't acting like their usual selves. She decides to spy on them in order to find out why.

Doofenschmirts and Perry are still fighting. They get so caught up in their fight that they don't pay attention when they're about to fall through a window. Both fall out of a window. As they fall, they open up their umbrellas, but the umbrellas are so high-density that it actually increases the speed of their fall. They let go of the umbrellas and Perry releases his parachute. As they fall, Perry catches Doof by his shoulders. They watche as the umbrellas hit the ground, creating two large craters. Doof then wonders how Perry managed to take the hits he dealt earlier.

Phineas and Ferb have now totally obliterated the game, and have escaped it. They are now trapped within the anti-gravity-force-field prison thing and they are both having fun floating around in it.

Mandy is walking home from her failed attempts at humiliating Candace. Along the way she comes across Phineas (Thadeus) and Ferb (Thor). She tries to ignore them and walk past them, but then Thadeus asks her what the problem is. She turns around and glares at them. Thadeus then tells her to relax, demonstrating that he is Thadeus, not Phineas. Thadeus asks her if she really wants to get revenge on Candace. She agrees, then Thadeus gives her a hologram and voice changer. Thadeus explains his plan to ruin Candace's date. He tells Mandy that they'll distract Candace as Phineas and Ferb while Mandy moves in as Candace in order to ruin the date. They begin moving towards the restaurant. Isabella has seen the whole thing. She gets filled with rage and plans to find the real Phineas and Ferb. Isabella makes her way back to her neighborhood.

Phineas and Ferb are floating around when they hear a car drive up to the house. After a while a women walks through the back door, seeing the boys in the force-field. The women frowns and moves towards the prison thing and frees the boys. She asks them about who did this to them. They say Thadeus and Thor did it, and that they had a blast. The women shakes her head, then takes out a phone, calling Thadeus and Thor's parents. She tells Phineas and Ferb to go back their yard. Phineas and Ferb go back, closing the gate behind them. They sit against the tree, bored, but then they decide to play their video game system while they wait for Thadeus and Thor. Isabella opens their gate.

Thadeus and Thor run into the restaurant doing many things in order to get Candace's attention. She runs after them, following them outside, far away from the restaurant. Mandy, who now looks and sounds like Candace, walks in. She sits down, acting like she's tired from chasing Phineas and Ferb. Jeremy asks her if she's okay. Suddenly she starts saying all these random things. She then says some bad things to Jeremy then says the date is over and she walks out, acting as if she is angry. Suddenly Isabella, Phineas, and Ferb appear at the entrance. Isabella points at Candace, saying that she is not the real Candace. Mandy starts panicking. Jeremy walks up to her, asking if everything is alright. Mandy (Who is still Candace) then runs out of the restaurant in a panic. The devices falls out of her mouth and pocket, revealing that she was in fact, not Candace. Jeremy just shrugs and says that that was weird.

Doof and Perry are back in Doof's lair. Doof then pushes the button to activate the HEAVY-Rain-Inator, laughing as a trapped Perry struggles. The rain destroys both game systems in the backyards. Thadeus and Thor's holograms are instantly deactivated, which Candace then notices. She angrily stomps off back to her date. Thadeus and Thor are about to move to stop her, when their parents drive up by them in a car. They scold Thadeus and Thor, telling them that they heard from their relatives that they had two other children trapped in a force-field. Their mother then complains about all the times that has happened (Thadeus and Thor have been locking other children in anti-gravity-force-fields during their school year). Their parents have them get in the car, telling them that they'll never visit their relatives here ever again. They drive off in search of Mandy. During the time all this happens, Thadeus and Thor are getting hit hard by the heavy rain. Their parents comment on how Danville has unpredictable weather.

Candace runs past Mandy, who is walking down the street all depressed. During this time, Candace is complaining about the rain. She manages to get to the restaurant, where Phineas and Ferb open the door for her. She gets in, soaking wet. She sits by Jeremy and they all wait for the storm to come to an end. Phineas, Isabella, and Ferb begin singing a song in order to kill some time.

Perry finally escapes Doof's trap and defeats him. Perry destroys the machine.

The song ends when the rain begins clearing up, the sun begins shining through the windows and everyone leaves.

Phineas, Ferb, and Isabella are now back in the backyard. Candace is till having her date with Jeremy. Phineas and Ferb are wondering where Thadeus and Thor have gone. Isabella tells them that Thadeus and Thor were up to no good, saying that they had disguised themselves as Phineas and Ferb and were causing trouble to her. Phineas is then disappointed that Thadeus and Thor weren't really being friendly, but wonders if they'll ever come back. Perry (in his domesticated form) is then seen floating down, strapped on to an umbrella. Phineas says the usual thing (Oh, there you are Perry). He then wonders why Perry was strapped to an umbrella. He unstraps Perry and picks up the umbrella. As soon as he does, it begins raining. Linda, looks outside, calling for the kids to come inside. Phineas looks at Perry and says thank you, holding the umbrella over himself, Ferb, and Isabella. Perry chatters and they all go inside. Candace and Jeremy are running through the rain. They find one of the two high-density umbrellas stuck in the ground. Jeremy picks it up and shields himself and Candace from the rain. They make their way home. The end. The credits would show Thadeus and Thor's parents counting off all the times Thadeus and Thor have put other kids in their anti-gravity-force-fields. Mandy has her face in her hands the whole time, complaining about the events that had happened. They finally reach their home. Thadeus and Thor get determined looks. Thadeus and Thor begin planning the ruin of Phineas and Ferb's lives for whenever they visit Danville again. They laugh maniacally as they walk into their home.