Phineas And Ferb Have the Biggest Food Fight ever, though it was actually because Isabella wanted to learn how food deteriorades. Doofenshmirtz creates a ray that turns food into water, causing Phineas and Ferb's food fight to turn into water and clean them, right before Candace could come and show it to her mom. However, she slips in the water and falls on Jeremy's hands, and they both go out. When Dr. Doofenshmirtz sees that his ray just affected on Phineas and Ferb's house, though he still doesn't who they're, he tries to make it more bigger for it to go more on the Tri-State Area, but Perry immediately jumps and destroys the machine. When Doofenshmirtz tries to see if one part still works, he ruins it and another ray comes, causing him to get naked. Phineas and Ferb, say goodbye to their friends and hit down on their backyard tree, while dawn came. Plus, Perry also came with them in his normal platypus identity and sat with them. The episode ends with Doofenshmirtz exclaiming "I'm still naked!"
The "Too Young" Line
He sings the food fight song.
Isabella: Hey Phineas, Whatcha Doing?
Phineas: Hey Isabella, remember when you said that you wanted to see how food deteriorades?
Phineas: Well, here is our food court to check at the food fight how food does it.
Candace: (through he window) Which is something I'm gonna bust!
Perry's entrance to His Lair
He didn't. A mushroom open and there appears Major Monogram.
Dr. Doofenshmirtz "interacts" with some sub-plot characters, though it was mactually in his screen where he saw them.
This is the first time where Phineas and Ferb have fun immaturely, though it was also to help Isabella learn.
This is other episode where Ferb sings in his normal voice. This was in a jazz version with the begging of the food fight. Another song in this episode is the Quirky Worky song, which was played when everyone passing towels to dry themselves from Doofenshmirtz's water.
This is the first time Dr. Doofenshmirtz doesn't capture Perry first. Also, when he doesn't explain specifically his plan, simply that hel use his machine of ray to turn food into water since when he was a kid, kids thought trash food came from at him.
Candace doesn't talk by phone with someone, or thinks of someone else, just tries to bust her brothers.
This is the first time not too many A-plot characters, aside from Phineas and Ferb, appear, just Buford, Baljeet, Isabella, few of the fireside girls, Candace, and Mom(cameo). The B-Plot, only Major Monogram, Perry, and Dr. Doofenshmirtz, Carl's voice is also briefly heard.
This is also the first time where Ms. Flynn makes cameo, also a silent one.
This is the first time Phineas loosely notices Isabella's love interest.