Brother and Sister are scared by what looks like a pumpkin-headed ghost. It actually turns out to be Papa! Mama tells that sometimes things can look different from the way they really are.
In this clip, Candace has to answer a call and tells her mother she is "taking" it. This is an idiom; one does not "take" a call so much as they answer it.
In this clip, Dr. Doofenshmirtz tells Perry the Platypus to "have a taste" of his ray gun. He isn't proposing that Perry literally taste the gun; he is telling Perry to experience it.