Injury Five-Oh

 a limited-time questline released on May 30, 2018. It was one of the main questlines of Act 1 of the Itchy & Scratchy Land 2018 Event. It requires the Itchy & Scratchy Land Gate and the Injury 500, and starts at The Itchy-Est Place on Earth Pt. 5 after Itchy appears.

Start
Unlocks crafting at the Itchy & Scratchy Land Gate.

End
Unlocks Amusement Bonus areas around the Itchy & Scratchy Land Gate.

Pt. 2
No dialogue.

Pt. 3
No dialogue.

Pt. 4
No dialogue.