Very recently in Juba between an increasingly overloaded Tower controller and an Australian caravan pilot on the landing rollout....
TWR: "xxxx expedite vacating runway, landing traffic"
Caravan: "roger"
Literally a couple of seconds later;
TWR: "xxxx I say again expedite vacating"
Caravan pilot (said with a nice twang) : "if I taxi any faster I'll take off again"
Who ever you are you gave us a good chuckle that day...