I was given a request a while back for a story where Jack returns and Scott and Penelope got lost in the Underworld. I hope this person doesn't mind, but I ended up… "splitting it in half", if you will. What this basically means is I made a story about Jack returning and am still working on a story where Scott and Penelope get lost in the Underworld, but it's not going to be the same story. Even though they may not be what was expected, I hope you all enjoy them.

As was mentioned before, there is a reference to a Bruce Willis movie near the end of the fanfiction. Though this will still carry some humor along with it, it's more of a suspenseful fanfic than a humor fanfic. I've decided to rate it T because of the fact that there are crazy psychos with Molotov cocktails in this fanfic.

I own Scott and Penelope. Maxwell Atoms owns Billy, Mandy, Grim, and related characters.

-1-

Mandy sat in the kitchen with a cup of coffee in her hands. It was 3:00 in the morning on a Saturday, but she wasn't tired. She was thinking too much to be tired.

Grim walked in, shocked. "Mandy? What are you doin' up so late?"

Mandy didn't look up. "I could ask you the same thing, Grim."

"Late-night reaping," Grim replied. "Now you."

Mandy sighed. "Grim? You ever get the feeling that something REALLY bad is about to happen?"

"Oh yeah. All de time."

Mandy shook her head. "This is different. It's big this time. I can feel it…"

"Don't worry, mon. Not'ing's gonna happen."

"How do you know?"

"Uh… I don't… but I'm sure what you're feeling is not'ing. Now, go to sleep, child."

"No thanks. I won't be sleeping for a while. This is my third cup of coffee."

"Oh. Well… goodnight," Grim said, going to bed.

"Goodnight, Grim."

When Grim left, Mandy sighed again. "Grim's lying. Something is definitely wrong." She gulped the coffee down and got up from her chair. "But… what could it be…?"

-X-

In the bowels of the Underworld, over a bridge of fiery magma, stood two hooded figures in cloaks. One figure, using a cane to hold himself up, looked at the other, who was raising his arms in excitement.

"At long last, you and I will reign over THE ENTIRE WORLD!" the second figure cackled.

"How?" the first figure asked, leaning on his cane.

"Simple, my fiendish friend: with the Grim Reaper's scythe!"

The first figure yawned. "So? We've tried to steal it before. Unsuccessfully, I might add."

The second figure shook his head. "Reginald, Reginald… why are you so naïve? Before, we were separate, but together we will reign supreme! And besides, we're now IMMORTAL! How can he stop us when we have the power of the Underworld on our side?"

"True… but how do we get the scythe?"

"Simple again, Reginald," the second man sneered as he pulled a feather from his cloak.

"A… feather?" the first man asked with no amusement, almost losing his balance on his cane from boredom.

"Hey, it's worked before…" The second man's laughter was heard throughout the Underworld.

-X-

Scott entered the kitchen, noticing his mom was now pacing the floor.

"Are… you okay, Mom?"

"Yeah… I had way too much coffee this morning. I've… been awake… for four hours," she said, twitching constantly.

"Uh… do you need to lie down?"

"No-no-no-no-no. I'll be fine."

"Geez, Mom. You're like Dad when he eats 20 Atomic Frenzy cakes."

"Don't you ever compare me to you father, Scott," Mandy scolded before lifting his hat and giving him a noogie.

"OW! Stop! I'm sorry!"

"Pathetic," Mandy said, letting him go.

Suddenly, a loud, girly scream pierced the air, almost shattering Mandy's and Scott's ears. The scream was followed by giddy laughter.

"Grim!" Mandy yelled. She and Scott ran into the living room.

What they saw shocked them.

Grim was being tickled by a feather.

But that wasn't what shocked Mandy. What shocked her was the man holding the feather.

The man turned his pumpkin-headed face to Mandy. "Jack's back…"