>One little boy raised his hand and said, "I think he said..
>'Holy Sh*t! A talking pig!'"
>
>The teacher was unable to teach for the next 10 minutes.

Fifth grade, teaching parts of the sentence - subject, predicate, object - and the three kinds of sentences - simple (just subject and verb), simple-extended (subject, verb and one more clause) and complex (joined sentences, multiple verbs). After the theory was laid out with a few examples,

teacher: alright... Mujo, let's hear an example of a simple sentence.

Mujo: Ox sings.

T: Though it doesn't make much sense, it is grammatically correct. Now make a simple-extended sentence out of it.

M: Ox sings on a twig.

T: Good... now what is the ox in that sentence?

M: The singer.