Llademos (Do you mean "LLAMEDOS" if you're from the Manor of "Soddem Hall" - teehee).
I quite agree that injecting a little humour (as long as the pudding is not over-egged) can break the tedium of a long flight! However, sometimes it's the unintentional remark that's the fuinniest. For example:
"Thank you for flying United Airlines. We do hope you've enjoyed the flight as much as we enjoyed taking you for a ride!!!"