The Chauffeur of a coal-gas-driven car (to a gathering crowd): Wot are you 'anging' around 'cre for? The Crowd: Please, Mister, we'se waiting for the balloon to go up. A humorous comment on the use of coal gas powered vehicles during the First World War, introduced as petrol became increasingly scarce. The 'gas bag' cars carried their fuel in an enormous rubber bag on the roof and were the subject of many jokes and cartoons such as this one by Alfred Leete, an artist best known for his famous Kitchener 'Your King and Country Needs You' cover for London Opinion magazine.