Schoolhouse Rock: Interjections!

So when you're happy (Hurray!) or sad (Aw!)
Or frightened (Eeeeeek!) or mad (Rats!)
Or excited (Wow!) or glad (Hey!)
An interjection starts a sentence right.

Interjections (Hey!) show excitement (Hey!) or emotion (Hey!).
They're generally set apart from a sentence by an exclamation point,
Or by a comma when the feeling's not as strong.

Interjections show excitement or emotion,
Hallelujah, Hallelujah, Hallelujah... YEA!

This episode is one of several that really sticks out in my mind.

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