What's the best part about having emo grass?
It cuts itself!
Emo Grass
Explanation
The joke plays on the stereotype of emo people being sad and self-harming. The punchline twists this stereotype by having the emo grass "cut itself," as if it were sad and self-destructive like an emo person. This gives a dark twist to an everyday concept. The humor is in the unexpected connection between emo people and grass and the absurd idea of grass hurting itself.