Jen's imaginary driving test/car chase in the kitchen.
As the family returns from an unsuccessful car trip:
Steven: It was bad enough without having to listen to Alex whine in the backseat all the way home.
Alex: [whining] I wasn't whining...
The over-the-top presentation Alex designs for Jennifer about how a bill becomes a law, filled with EaglelandPatriotic Fervor—he has her dress as the Statue of Liberty and end with a huge Rousing Speech and fireworks, with the result that the teacher applauds and ends up in tears. The kicker, however, is that he had been pretending to be a dumb jock...so that when Jennifer finally threw a fit and quit over Alex's Stage Mom antics in "directing" her, he suddenly drops the facade and tries to fill in to give the presentation, ending with a very sheepish slip back into "dumbness", claiming he was only saying "what he'd heard his sister say".
When Steven walks in on Nick with a pair of flowers, doing an impromptu song asking Mallory to marry him.
One episode starts with Elise showing Andrew pictures of his family and asking who they are. He correctly identifies the first two. Then we get to the third.