If you have to explain it then it is not that good.
Of course, there's, but here goes mine: ...and that, my liege, is how we know the Earth to be banana shaped. This new learning amazes me, Sir Bedevere. Explain again how sheep's bladders may be employed to prevent earthquakes.
In Yeah you'd probably only get this if you read ASOIF but the joke came to me randomly.
My dad and I are going out for sushi tonight, and he has rescheduled this dinner with me several times for dumb reasons (one night was because he randomly decided to go out drinking instead). Would love to get my revenge by making sushi puns and jokes all night, but Google is failing me--I've only been able to find jokes that either make no sense, or are just not funny at all. Help!