A few favourite quotes from role-playing games that have now passed into history:
"This scroll is useless! All it says is 'Hastur, Hastur, Hastur' over and over again!"
"Half a horse? Does it look like it's been mutilated?"
"I cannot tell a lie, we are actually members of the city guard, come to impound your pub, take all your beer and arrest you! ... No! No! Just a joke! We are actually members of the Cardolan Royal family, reincarnated as elves! ... No! No! I cannot tell a lie! We are actually a party of dwarvish adventurers! ... Ermmm......"