California-based flight instructor and raconteur Rod Machado recalls one time when he tried to introduce the student to correct radio procedures:

Student: "What do I say?"

Instructor: "Tell them you want to take-off"

Student: (using radio) "I want to take-off"

Instructor: "Let go of the button dummy!"

ATC: "Well...what do I say?"

ATC2: "Tell him he's cleared to take-off."

ATC: "You're cleared to take-off....what do I do now?"

ATC2: "Let go of the button dummy!"

Source: Flight International