How do you fit 27 New Zealand tourists in a 15-seater bus?
Simple. All in the ashtray.
Listen up, buttercup. You're probably one of those city slickers who thinks milk comes from a carton. This joke is dark because it implies that the New Zealand tourists are dead and have been cremated. Get it? Ashtray? Ashes? The joke implies the tourists are so small they fit into the ashtray. Do you understand it now, sweetie pie?