I think I may be stupid

what

Peter, why would this car make someone so nervous?

Peter help, what is the joke here?

I dun knu

Peter.. uhh something something, what’s the joke.

What is so happy about this place

Peter why is my car relevant

what game are they talking about?

I know 4 of the 5 characters (idk top left), but I have no idea what this means?

Hundreds of comments with no explanation, I guess I’m the R??