The Indominus Rex was just waiting for the polls to show to see who came in first place,,

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It was roaming around the park, waiting for the movie list to show,
"DING!"
the Indominus Rex heard the bell, meaning the polls are out! So the Irex ran through the park, (running over Galimimus and Raptors in the process) and when it  arrived, it dropped its jaw in shock

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Inside Out won
The Indominus Rex suddenly felt, deep, deep, hunger and hatred, it felt.... enraged.

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And with that, the Irex went and snuck on a boat, and it was heading towards San Francisco.

San Francisco.
The emotions in Riley's head were just relaxing until Joy showed up, filled with excitement and glee, "WOOHOOOOO!, guys guess what!" "What is it Joy, did the Teacher called and say we failed our homework?"
"No Anger."
"D-did another scary movie show up?"
"No Fear."
"Did Mom and Dad buy broccoli pizza?"
"No Disgust."
"Did the team lose again?"
"No Sadness, I'm cheering, because......WE GOT FIRST PLACE ON TOP MOVIES OF AMERICA!" The emotion were shocked "WHAT?!" "I know right!" "Woohoo!" I knew we could do it!" "You can say that again Ange-." Joy was suddenly interrupted when they heard a door knocking, "Oh, someone wants to see us."
To Riley
Riley got up and opened the door, and what she saw was nothing, "Hello?"
Back to the Mindworld
"OH WOW, DING DING DITCHERS!, I HATE THOSE RASCALS!"
"Calm down Anger, it's not like they-"

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She was interrupted when she heard a loud growl.
l-left?"
Back to Riley
She backed up until something grabbed her and picked her up,
MindWorld
"SOMETHING CAUGHT US,I REPEAT, SOMETHING CAUGHT US!
"C-Calm down Fear, it's gonna be ok!"
To Riley
As the invisible figure put her up close, she breathed down at her.
MW (you get the idea)
"Ugh, even it's breath is disgusting."
"Disgust, don't, you'll provoke it!"
Riley
Riley was forming tears as she was being picked up by the mysterious force.
MW
"S-Sadness stop!, your making her cry!"
"What's (sniffs) the point Joy?, sniffs) were gonna be eaten(crying)"
"C-calm down, w-we are not about...to...get..e-eat-ten?"
Riley
Riley paled even more when she saw the figure

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It was the Indominus Rex,

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It roar and chomped down on Riley
"AAAAAHHHH!" Riley screamed.
MW
"AAAAAAH!" All the emotions screamed as their last vision was the I-rex, chomping down on them, and everything was black, nothing could be hear except the roar of victory from the Indominus Rex.

[There should be a GIF or video here. Update the app now to see it.]

The End
And that is how Riley and her Emotions got eaten by the Indominus Rex.