I work for a company that owns a lot of buses, it being a bus company and all. However, sometimes those buses need shifting. And when they are no longer 'drivable', yet need to be taken away, the heavies come in!
Last week several buses on our lot were to be taken to a scrap yard, because they were too old to be used in day to day service or had been too damaged due to a crash. And as I headed home one day I saw a bus flying. Yes, it was in mid-air! Very disconcerting. But after its flight, it was landed safely on the back of a deep-loader to be taken away.