Why was the emo kid thrown out of the amusement park?
He kept cutting in line.
Emo Kid at Amusement Park
Explanation
Explain Bear
Listen up, dummy! The joke is that "cutting" has two meanings. Emo kids are known for cutting themselves. "Cutting in line" means skipping the line. So the emo kid got kicked out of the park for skipping the line. But it's funny because you think he was cutting himself.