Here is how Jack's sorrow and Sally goes in Code Red enters the Nightmare before Christmas.
(We then see Sally picking stuff in the cemetary)
(she hides when she hears Jack enter)
Jack Skellington:(taps his leg and his dog, Zero comes out)
Indominus Rex:(whispering) Aw, it's a puppy.
(As they follow him, Jack starts singing about his sorrow)
Jack Skellington: There are few who deny at what I do I am the best~
For my talents are renowned far and wide~
When it comes to surprises in the moonlit night, I excel without ever even trying~
With the slightest little effort of my ghost like charm~
I have seen grown men give out a shriek~
With the wave of my hand and a well placed moan~
I have swept the very bravest off their feet~
Indominus Rex and Firestar:(whispering) Whoa.
Jack Skellington: Yet year after year, it's the same routine~
And I grow so weary of the sound of screams~
And I, Jack, the Pumpkin King, have grown so tired of the same old thing~
Oh somewhere deep inside of these bones, an emptiness began to grow~
There's something out there far from my home~
A longing that I've never known~
I'm a master of fright~
And a demon of light~
And I'll scare you right out of your pants~
And to a guy in Kentucky~
I'm Mr. Unlucky~
And I'm known throughout England and France~
And since I am dead~
I can take off my head, to recite Shakespearian quotations~
No animal nor man can scream like I can~
With the fury of my recitations~
But who here would ever understand that the Pumpkin King with the skeleton grin~
Would tire of his crown~
If they only understood~
He'd give it all up if he only could~
There's an empty place in my bones~
That calls out for something unknown~
The fame and praise come year after year~
Does nothing for these empty tears~
Deadpool:(teleports the recruits to him)
Sally: I know how you feel Jack.
(we then see her in her home when a light comes on and a voice is heard)
Dr. Finklestein: Sally is that you?(comes down the ramp spiral and sees her)
Sally: I had to.
Dr. Finklestein: For this?(holds up her arm which waves at her)
[we then see the Dr. sewing her arm back on]
Dr. Finklestein: That's twice you slipped Deadly Nightshade into my tea and ran off.
Sally: Three times.
Dr. Finklestein: You're mine you know! I made you! With my own hands!
Sally: You can make other creations! I'm restless. I can't help it.
Dr. Finklestein: It's a phase, my dear. It'll pass. We need to be patient, that's all.
Sally: That's all.