It was nightfall in a boy's bedroom, and the boy's parents are just saying goodnight to their son. Even their son needed a good night's sleep.
"Good night, sweetheart." The mother spoke.
"Good night, Mom." The boy said sweetly.
"Sleep tight kiddo." The father replied. As soon as the lights turn off, the parents close the door. The boy drifted off into a peaceful sleep and it was a very quiet night with the silence broken by a gentle wind blowing the curtain, and the faint ticking of an alarm clock on a nightstand nearby. Everything was blissful, until the closet door crept open.
The boy woke up to see what's going on. Something that looks like a monster's arm poked out of the doorway. He was a little frightened at first, but he saw that it was just a sweatshirt sleeve instead, so he resumes his slumber. From underneath the bed, two eyes open in the dark space.
A shadow loomed over the boy, and a red-haired overweight monster with a red and orange striped shirt and brown glasses raised its claws, about to pounce with a snarl. His name was Carl Wheezer. The boy shot up with a horrified scream, thus scaring Carl. Carl stepped back on a soccer ball, and the ball bounced off the wall and hit him in the face. Disoriented, he slipped on a skateboard and landed in jacks on his butt.
Carl screamed again, but this time in pain. He ran around screaming as he tried to get the jacks off his bottom. Suddenly the lights turn on, much to Carl's surprise, and an alarm sounded. The boy who screamed was actually a robot on a fake bed. The monster stood up as the wall went up as he removed another jack from his butt.
"Simulation terminated. Simulation terminated. Simulation terminated. Simulation terminated. Simulation terminated." A female voice rang out.
Sitting before Carl is a humanoid bat with red-orange hair in a green shirt named Lois Griffin, a director of the training room of an unspecified location. Sitting behind Lois was a monstrous cat named Gumball Watterson, a zombie sloth named Sid, and a corpse with white haired named Lincoln Loud. Carl Wheezer was a trainee for scaring children.
"All right, Mr. Wheezer, is it?" Lois asked.
"Um, my friends call me Carl." Carl replied.
"Uh-huh. Mr. Wheezer, can you at least tell me what you did wrong?"
"I fell down?" Carl guessed.
"No, no, before that." Lois turned to his coworkers, "Can anyone tell me Mr. Wheezer's big mistake?" The three just stared at Lois as if they had no idea what Lois is talking about. "Anyone?" Sid just coughed, and Lois exasperatedly groaned as he turned back to her controls. She turned a knob and sighed, "Let's take a look at the tape."
She rewinds the footage of Carl's progress. "Here we go. Uh, right...ah, there! See, the door. You left it wide open."
Carl had forgotten to close the closet door, and he knew why he tripped over the props in the training room. Sid, Gumball, and Lincoln realized this and took notes on clipboards.
"And leaving the door open is the worst mistake any employee can make, because...? Lois started.
"Um, it could let in a draft?" Carl asked.
"It could let in a child!" A voice boomed. Everyone turned to see a crab-like monster with a white beard and glasses with green lenses. His outfit consists of an orange vest with a transparent badge. His name is Chester V, the CEO of a factory.
"Oh! Chester V!" Lois realized.
"There's nothing more toxic...or deadly than any human child! A single touch could kill you!" Chester pointed to Carl, who nervously backed away from the simulation boy. Chester stepped closer, and he continued, "Leave a door open, and a child can walk right into this factory. Not only that, right into the monster world!"
Gumball whimpered as he jumped into Sid's arms, "I won't go in a kid's room! You can't make me!"
Chester commanded, "You're going in there, because we need this." He picked up a yellow can and for emphasis, he turned the knob on the top and a child's scream resonated from it, causing the power to flicker. Chester turned the knob and it stopped as the power became normal again.
"Our city is counting on you to collect those kids' screams." Chester put down the can, and he continued, "Without scream, we have no power. Yes, it's very dangerous work, and that's why I need you to be at your best." Chester added with new resolve, "I need scarers who are confident, tenacious, tough, intimidating. I need scarers like...like...Alex the Lion."