Funny you should mention it.

 Accidentally apposite is still an improvement.

Does he mean Arnold Ziffel from Green Acres?

Cimabue, Cimabue.

 He's a bold, adventurin' man.

His blade was tempera.

Words in words.

 It's as if someone planned it that way.

Do you find a denizen in a den?

Between you and me.

 The Bench could be bugged, you know.

And there is always a parabolic microphone.

Unanimous HoF inductee.

 He got all the first place votes on all the ballots.

No one came in second.

Opportunity knocks.

 Opportunity isn't lost. It's still on Mars.

It just isn't working any longer.

The first Thanksgiving.

 No good deed ever goes unpunished.

No take backs.

The simple life.

 Only the bare necessities of life.

Such decadent luxury.

The four humors.

 The gall of some people.

Keep it up, and he will vent his spleen.

Nothing to sneeze at.

 And just who has the last laugh?

Walking on the edge.

You press the button, we do the rest.

 Quick, take a snapshot.

This is a real Kodak moment.

Making cents of it all.

 Money is no object. It's the subject.

A penny saved is still one cent.

Put your dreams away for another day.

 Try telling that to Old Blue Eyes.

One person's daydream is another person's nightmare.

The manly art.

 Might want to try right-handed next time.

Upholding the male sense of self-worth.

In search of the free lunch.

 The box is probably free to large depositors anyway.

Some people have all the luck.

On the tramp.

 There weren't any tramp liners available.

He walked all the way.

Make no bones about it.

 It could be the skeleton of Radioactive Man.

Which would explain the glow-in-the-dark property.

But me no buts.

 The butt of the joke is not.

Making an ash of himself.

Testing, testing.

 This has been a test of the Emergency Broadcast System.

We now resume normal programming in progress.

Foreign substances.

 You won't catch him using that stuff.

A ringing non-endorsement.

Dreaming with wild abandon.

 Or maybe he should just hug his father.

He's not insecure, just paranoid.

The bare facts.

 In the words of Marilyn Monroe,

When asked what she had on at the time: "The radio."

One of a kind.

 It says something about one or both of them.

It all depends on which one.

This little piggy.

 That's from outside the three-point zone.

"This little piggy went wee, wee, wee all the way home."

In a happy place.

 Happily for him, there are not that many of them.

Making life miserable for everyone else by comparison.

Fear Itself.

 To be free of fear of high drug prices,

And over-medication.

The empty hat.

 Nothing up his sleeve, and nothing in his hat.

Now you see him...

The Taxman Cometh.

 As if Barney believed in Taxes.

And the moral of the story is Itemize.

Adventures in orthography.

 You say potato, I say potahto.

Can't say that she wasn't prepared.

The times they are a-changing.

 So hard to keep up-to-date on all the new trends.

Like publicizing your bad behavior.