http://www.bbc.com/news/in-pictures-31869430 (http://www.bbc.com/news/in-pictures-31869430)
scroll down to the eighth photo.
It was a bus conversion (OK, sort of). A Bedford VAL is front-engine, so it could probably stick out quite a way before gravity overcomes it.
John
That same installation was on the roof of a building in the UK during the Olympics..I'll try to find a photo of it.
Jeremy
(https://busconversionmagazine.com/forum/proxy.php?request=http%3A%2F%2Fwww.dlwp.com%2FImages%2Fimages%2Frwweb1.jpg&hash=d173611a673d4c2a13bdac757fd831b3cee2b821)