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??

Petah I don't get it, 10 gallon hat? Does that have something to do with the shower?

Im sure the answer is on the tip of my tongue, just don't know the context.