The bouncer / security guard is asking for ID (identification), but the hillbilly thinks he is asking if he has any “idee” (idea pronounced with a very strong accent). So the hillbilly is asking “idea about what?”
We’re not at the height of comedy here.
I wouldn’t have said this is Far Side. This doesn’t look like his drawing style. But I could be wrong.
Also, Far Side has some great jokes. I’m a fan.