[Cueball is sitting at his desk, using his computer.]
Cueball: Yeah?
[Black Hat lifts his hat, revealing his “headcannon”: a tiny cannon on the top of his head. The headcannon fires and blows up Cueball’s desk, the explosion throwing Cueball backwards.]
Headcannon: BOOM
Cueball: Augh!
Ok it’s in my head canon now.
It’s in my head, period
https://xkcd.com/1401/
Transcript
[Black Hat walks in.]
Black Hat: New headcannon:
[Cueball is sitting at his desk, using his computer.]
Cueball: Yeah?
[Black Hat lifts his hat, revealing his “headcannon”: a tiny cannon on the top of his head. The headcannon fires and blows up Cueball’s desk, the explosion throwing Cueball backwards.]
Headcannon: BOOM
Cueball: Augh!