List of running gags

Running gags are jokes or events that are seen throughout the series.

"Whatcha doin'?" said by

 * Isabella (Main character to say it)
 * Lawrence ("Greece Lightning")
 * Linda ("The Best Lazy Day Ever")
 * Buford ("Out of Toon", "Swiss Family Phineas")
 * Norm ("Hail Doofania!")
 * Phineas ("Run Away Runway", "I Scream, You Scream", "At the Car Wash", "That Sinking Feeling", "Phineas and Ferb's Quantum Boogaloo", "We Call it Maze")
 * Baljeet ("Bowl-R-Ama Drama")
 * Unnamed dream Sergeant ("Phineas and Ferb Get Busted!")
 * Candace ("Phineas and Ferb Christmas Vacation!", "Suddenly Suzy")
 * Suzy ("Suddenly Suzy")

"Where's Perry?" and "Oh, there you are, Perry" said by

 * Phineas (Main character to say it)
 * Irving ("Hide and Seek")
 * Ferb ("Fireside Girl Jamboree")
 * Stacy ("Put That Putter Away")
 * Candace ("Oh, There You Are, Perry", "Phineas and Ferb Hawaiian Vacation")
 * Lawrence ("Comet Kermillian", "Out of Toon", "Tip of the Day", "Swiss Family Phineas")
 * Isabella ("It's About Time!","The Flying Fishmonger", "Cheer Up Candace", "The Lizard Whisperer")
 * Major Monogram ("Phineas and Ferb-Busters!")
 * Hotel Manager ("Phineas and Ferb Hawaiian Vacation")
 * Chaka Khan ("Phineas and Ferb Summer Belongs to You!")
 * Heinz Doofenshmirtz ("Hail Doofania!"), ("Nerds of a Feather")
 * Linda Flynn-Fletcher ("Ladies and Gentlemen, Meet Max Modem!", "The Great Indoors")

Episodes that Ferb has been cut off mid-sentence

 * "Vanessassary Roughness" (We learn Ferb is short for something)
 * "Get That Bigfoot Outa My Face!"
 * "Ready for the Bettys" (Repeatedly)
 * "Undercover Carl"
 * "We Call it Maze"
 * "Nerds of a Feather"

The bird that runs into Phineas and Ferb's invention

 * "Rollercoaster"
 * "Candace Loses Her Head"
 * "Out to Launch"
 * "Does This Duckbill Make Me Look Fat?"
 * "Picture This"
 * "The Doof Side of the Moon"
 * "Split Personality"
 * "Rollercoaster: The Musical!"

Things that have fallen out of the sky

 * Ice cream ("Raging Bully")
 * Miniature golf course ("Put That Putter Away")
 * Steaks ("Comet Kermillian")
 * Rabbits, and later a van ("Leave the Busting to Us!")
 * The perfect lantern ("Vanessassary Roughness")
 * A quart of ice cream ("Swiss Family Phineas")
 * A giant present ("Phineas and Ferb Christmas Vacation!")
 * A cat ("saved" by Doofenshmirtz) ("Voyage to the Bottom of Buford")
 * Phineas and Ferb's replica of Niagara Falls ("Suddenly Suzy")
 * A battery cart ("Rollercoaster: The Musical!")
 * Heinz Doofenshmirtz and a Dodo Bird ("Last Train to Bustville")

Out, Peace!

 * Candace (Main character to say it)
 * Unknown guy ("Unfair Science Fair Redux (Another Story)")
 * Ferb's cousin ("Invasion of the Ferb Snatchers")
 * Narrator guy ("The Beak")
 * Melanie ("She's the Mayor")
 * Single guy ("Phineas and Ferb Hawaiian Vacation")
 * Heinz Doofenshmirtz ("Nerds of a Feather")