Best one-two punch ever?

[Stardust]

In short, which two tracks make for the best one-two punch in music history? Let's hear your opinion!

Here's an example:

Aces High-2 Minutes To Midnight (Iron Maiden, Powerslave)

That's a great one-two punch, right? Oh, yes it is!

One of my favorite one-two punches ever is Eleventh Earl Of Mar-One For The Vine on Genesis' album Wind And Wuthering.

Now what's your favorite one-two punch (punches?) in music history?

 

[Brigantium]

There was a 'best three in succession' thread at some point, I'll have to think about best one-two. By 'punch' do you mean a really kick ass pair of songs? (As opposed to say Moonchild and Infinite Dreams, which flow well together, but don't necessarily jump up and slap you around the face).

 

[Collin]

Battery and Master of Puppets. Duh

 

[MrKnickerbocker]

I'm only looking at opening tracks here, which I realized was not a rule proposed by the OP, but I'm not willing to spend time combing through entire albums.

For Maiden: Aces Highs/2 Minutes to Midnight wins, but Wicker Man/Ghost of the Navigator is also awesome.

Sabaton - Attero Dominatus/Nuclear Attack, Ghost Division/The Art of War, Lion from the North/Gott Mit Uns, Night Witches/No Bullets Fly, any other two Sabaton songs back to back except Ballad of Bull

Megadeth - Holy Wars/Hangar 18 (Rust in Peace) might just be the best opening double header in metal history. In general, Megadeth is pretty good at opening albums.

Symphony X - Of Sins and Shadows/Sea of Lies (The Divine Wings of Tragedy) and Inferno/Wicked (The Odyssey)

Mediocre/bad albums, but Anthrax's Stomp 442 and Volume 8 open fantastically with Random Acts of Senseless Violence/Fueled and Crush/Catharsis.

Kamelot - Center of the Universe/Farewell (Epica) and March of Mephisto/When the Lights are Down (The Black Halo)

Nightwish - Dark Chest of Wonders/Wish I Had an Angel (Once)

Also Stand Up and Shout/Holy Diver by Dio and the beginning of most Opeth albums.

And this:

Battery and Master of Puppets. Duh

 

[RTC]

We Will Rock You and We Are The Champions. While I prefer Aces and Minutes, this combination has reached legendary status that no other one-two punch has achieved, and I honestly believe rightfully so.

For Whom The Bell Tolls and Fade To Black is a good shout too.