arch-type roll bars are provided behind each seat. it has a hole on the top so some of the smoke leaves the barrel and so that the flames do not go out altogether. care should be taken to avoid confusing the two compounds. finally there is still about a dozen farms which traditionally are oriented towards dairy cattle and grain farming. the visitors stay in the bus. that message could say "save 50% in the next 5 minutes only when you purchase from our store." 