I see a lot of jokes put up on here, so here is one my favourites, I hope I tell it right:

A lady is on an airplane reading her bible when the passenger next to her says "What are you reading?", so she says I'm reading the bible".
The passenger says "the bible, surely you don't believe everything you read in the bible do you?"
The lady replies "why yes, I believe it is the very word of God"
So the passenger says "but what about Jonah and the whale, surely you don't believe a whale could swallow a man and he could live in there for 3 days"
The lady says "well when I die and go to heaven and I meet Jonah, I'll just have to ask him what it was like"
The passenger says derisively "ok, but what if he isn't there?"
So the lady said "well then when you die you're going to have to ask him"