I want to shoot my friend's annoying flatmate with a nerf gun whilst high
Would that make you feel better?
I feel like it will be a little cathartic for me
It's not nice to hurt someone. You shouldn't be so violent.
Nah, it will be fine.
A nerf gun is pretty harmless, so I don't see how they might hurt him. I think it is fine to goof around with your buddies, as long as the prank is harmless and you both are laughing at it.