One Good Scare was the song Phineas sang as he ran through his haunted house when Isabella had the hiccups in the episode " One Good Scare Ought to Do It!"
Come, let's tip-toe into the dark Phineas: One good scare oughta do ya!
You'll find our bite much worse than our bark!
One good scare ought to do you some good!
If you should find the daily grind a tad bit taxing on the mind; to help unwind if so inclined, I have a small suggestion...
That if you dare into my lair, you should prepare for quite a scare!
But "Will you share in this nightmare?" would be my only question.
Boo! Boo, I say!
Baljeet: Phineas: Baljeet?
Baljeet: Oh, I am not Baljeet. I am the scariest thing known to man: a failed math test.
Phineas: Yeah, right. We're just gonna move on now.
Baljeet: You can run, but it won't be to the college of your choice, I tell you!
Phineas: If your hair lies lifeless and limp, one good scare oughta do ya Come with me, now, don't be a wimp!
One little scare ought to do ya some good.
Phineas: Hello? Buford?
Buford: Behold... the face of evil.
Phineas: Buford, are you supposed to be Jeremy's little sister? You said you were gonna be something scary!
Buford: She is scary, man. She gives me the willies.
Phineas (speaking slowly): Little Suzy Johnson gives you the willies.
Buford: You don't know man, you don't know!
Phineas: Uh... we'll catch up to you later, okay?
Wash away the horror. Wash away the horror. Buford:
Singers: La, la, la, la, la, la, la, la, la La, la, la, la, la, la, la, la, la
Phineas: That is quite right, I would delight in taking flight into the night. If I may give you such a fright, you know I surely would!
But if I seem a bit extreme in my attempts to make you scream,
Remember that this spooky scheme will cure...
Singers: La, la, la, la, la, la, la, la, la Spooky Faces: One little,
Phineas & Spooky Faces: One little scare oughta do you some good!
: (Deep, diabolical laugh) Ferb
Buford is shown as Suzy, which shows he is scared of her, just like Candace.
The entire song, Phineas is holding Isabella's hand, except when he says, "Come with me, now, don't be a wimp!" and " ... quite a scare!", as well as "...but will you share in this nightmare?" and for a short while on the rollercoaster.
In the part of the roller coaster (while "one little" is said 4 times) Isabella is laughing, but right after that she looks very scared.
The melody of this song can be heard as elevator music when Candace enters the elevator with the Giant Floating Baby Head.